Halftrack M9A1 – lot 206

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This M-9-A-1-1840-ORD-1340 was built by International Harvester Corporation in August 1943 and rolled off the production line as a M9A1 halftrack with winch. This M9A1 was definitely in service for the Allied troops liberating Europe! From the OD it received US ID USA 40683599  however it never saw active service in the US Army because it was supplied to allied to be active on the Western Front.

Its wartime history is currently unknown, but it either served in the British, Commonwealth or Canadian or Polish Army during the liberation of Europe. If the halftrack could speak, its stories would certainly be overwhelming, as it served in the United Kingdom, France, most likely Belgium and the Netherlands, and was eventually active during the final battle in Germany.

After the war this example was overhauled in France in the fifties and saw service in the French Army. It was decommissioned in the seventies and sold to a local collector who restored it completely in the late eighties.

It was never decommissioned / torch cut and according to our opinion it is one of the most original examples we ever have seen.

1.1       Some remarks

  • This M9A1 is almost 100% original
  • Never used in a civil application: Straight Army release so not abused and modified
  • Older Class A restoration showing very little signs of usage
  • Original M9A1 marked heavy canvas top and original aged cushions
  • Original RED Diamond 450 B; Good oil pressure and an excellent runner
  • Great wiring and fully original instrumentation
  • Data plates: very nice copies produced in zinc.
  • Suspension in very good condition; tracks 90%; brakes are working excellent
  • All original armor with original hard stamping; never cut for demilitarization
  • All seats and other sheet metal parts are original
  • Complete with all cradle and carriages
  • Comes with all accessories as indicated on the pictures

Conclusion: this is an absolutely superb Halftrack and therefore a good investment and highly collectable.

The International Harvester M9A1 Half-track model is, for the serious MV enthusiast, a must-have in his collection.


1.2     Why bidding and buying this Halftrack?

Some Facts & Figures:

  • The International Halftrack is, according to serious MV collectors and enthusiasts, the best Halftrack produced by the US Industry in
  • Halftracks as being produced by International Harvester are much rarer than the models which have been produced by White, Autocar and Diamond-T. Same for the parts which makes these vehicles highly collectible
  • This Half-track is almost 100% original, Class A restored and in great running condition.
  • It is, next to enjoying it, a sound investment for a serious collector
  • Comes with Belgium road registration
  • Has been active in WW-II on the Western Front

1.3     Investment

An investment in professional restored WW-II historical military vehicles is very valuable. Annual price increase is at least 5-20% depending on popularity and rarity. Our sister company BAIV BV is, in this respect, one of the market leaders. The estimated current market value of a fully Class A restored M5A1 or M9A1 Halftrack is according to our opinion between € 100.000 and € 120.000 (Price level December 2022).

However, on November 2017 one of BAIV’s Halftracks (The Krystyna) was sold at the Imperial War Museum Duxford Motor Car Auction in the UK.

This vehicle; the first ever restored by BAIV’s founders and owners Ivo Rigter Jr. and Sr., was sold to an US customer for

£ 135.000, – (excluding buyer’s premium and shipment). See link

The half-track M5/M5A1 and M9A1 was created out of a need to produce more (M3) half-tracks. Unlike tanks, which required complex transmissions and brakes for steering, the half-track needed only conventional automotive steering. This kind of vehicles were therefore very popular during the start of the WW-II. Basically, designed and developed in France in the period between WW-I and II the design was as well adopted by the Germans as the US forces. They were easy to drive, operate and less training was required on half-tracks than for operators (drivers) of fully tracked vehicles.

White, Autocar, and Diamond T could not keep pace with the demand for half-track personnel carriers and other models. Therefore mid 1941 International Harvester Company (IHC) from Chicago, Illinois was requested to produce half-tracks as well.

IHC was formed in 1902 by the merger of the Mc Cormick Company of Chicago, the Deering Harvester Company, and several other smaller firms. It gradually expanded to eventually build farm implements, tractors, stationary engines, trucks, construction equipment and household appliances. Along with other manufacturers it branched out into military production after the attack on the US fleet in Pearl Harbor.

The engineers of IHC did an extensive study to improve the design in combination with the large-scale manufacturing equipment they have and made many changes to the design. These vehicles became the M5 and M5A1 and M9A1 half-tracks. Next to this the M14 and later also the M17 was produced with in the rear a Maxon turret. However, the essential features of the vehicles remained the same the IHC models differed in many respects from the M3.

The armor was manufactured from 5/16-inch homogenous armored plate which could be bent rather than the ¼ inch face-hardened steel of the M3. This made the M5/M5A1 heavier than the M3. To avoid performance loss the IHC models were fitted with heavier so called ´banjo´ model axles, strengthened chassis and hull and the introduction of the suburb International Harvester RED-450-B engine with overhead valves. A very modern and state of the art engine in these days! The International Halftrack, standardized in June 1942, is without any doubt the best US half-track vehicle ever built. Technical superior to White, Autocar, and the Diamond T models, very well designed, and loved by its crew even though it had a limited capacity for stowage.

Comfort, speed, and performance made the vehicle a great pleasure to drive. Disadvantages were that the armor plate only stopped small arms fire and shell and mortar splinters. It could not withstand direct artillery and anti-tank fire.

Moreover, just because it was easy to drive did not mean that drivers did not have to be careful! As a result, the First Canadian Army in Britain introduced a 30-mph road speed limit for half-tracks to reduce accidents.

Physically the M5 and M9 versions had a couple of notable differences. For example, the IHC half-track’s fenders were flat in cross-section (rather than round), and it was never fitted with the large fender-mounted headlights. The use of rolled homogeneous steel armor by IHC on their vehicles allowed plates to be welded together, giving the M5 much smoother appearance than the bolted M3 half-tracks. This also improved the ballistic protection.

For this purpose, bullet catchers were also designed and introduced by IHC compared to simple flat strips on the other half-track models.

In addition, the IHC half-tracks featured rounded rear corners, which contrast to the right-angled corners on the M2 and M3. IHC halftracks always had a very good reputation! 

result of the Lend-Lease program, the Halftracks produced by International Harvester were classified as “limited standard” by the US authorities.

This resulted in more than half of the M5 (4.625) and M5A1 production (2.959) and later also the M9A1 (3.433) were send to Britain where they were used by the Armoured Divisions of Britain, Canada, and many other allied nations under Lend-Lease such as the Polish, Dutch , Australian, New Zealand and French forces for Motor Infantry transport, engineer vehicles, command vehicles and anti-tank gun tows.

A total of 420 halftracks produced by International Harvester went to the Soviet Union. The remainder were used for training purposes in the United States.

Location: & Collection

Current location of this object is Turnhout area, Belgium
Local collection is available for this lot.

Depending on the destination the Buyer shall obtain an International Import Certificate / End User Certificate. Some of the items listed in the auction may require special licenses or permits or existing documents must be prepared for export. If this is relevant, Tracks & Trade will take care of this for you, with the applicable costs being passed on to the successful bidder
Please email [email protected] if you have any questions or concerns.

No item will be allowed to be collected without 100% of all legal requirements being fulfilled.


Margin / VAT

This object is offered by Tracks & Trade pursuant to consignment sale on behalf of a private individual. Therefore, the margin scheme will be applicable, so no sales tax (VAT) over the hammer price will be applicable. For more info see General Conditions of Sale Article 9.

Buyer’s Premium

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Inspections dates are listed in Colophon page and are conducted under following conditions:

  • Inspections will be strictly maximum 1 hour long escorted inspections,
  • Maximum of 3 customers per escorted tour,
  • Customers must book in prior to inspection,
  • Inspection times are 9am 10am 11am 1pm 2pm 3pm 4pm,
  • Please note that these inspections might be performed at several locations,
  • Inspections for a longer period or outside these hours can be organized for a refundable fee. (Refundable off purchase price of Auction lot).


To make a booking please reply to [email protected] at least 48 hours before the inspection with the following details:

Full Name(s) and contact details and phone number of the people that are coming to inspect. The LOT number(s) and Auction Name that you wish to inspect (items are stored on several locations, and we will need to retrieve them prior to your arrival).

Parts, accessories, and militaria

The batches of spare parts, various accessories and militaria are stored in the best conditions but are sold as-is and delivered without any guarantee of functioning.


Vehicles and vehicle related equipment such as

Cars, motorcycles, trucks, cannons or howitzers, armored vehicles, and tanks are sold in as-is condition, no technical guarantee and guarantee of authenticity and with or without registration (see description).



Parts, accessories, and militaria

The collection of the lots, subject to payment, starting by appointment only, date is listed in the Colophon page.


Vehicles can be picked up, subject to payment, starting by appointment only, date is listed in the Colophon page.
Handling costs for the removal of the vehicles will, when applicable, be applied at cost.

Arms & weapons

The Auction House will not supply ANY item unless the correct paperwork and licensing – if needed – have supplied in full.

If required and applicable (fire)arms can be made inoperable or permanently disabled by BAIV in The Netherlands as being a licensed Arms & Weapons Dealer Registration Nr. NL20191618779. In this case all relevant cost will be charged to the Buyer in addition and have to be paid in advance in full. Collection by appointment only!


Delivery and Storage

Removal of lots must be completed by the date listed on the Colophon page, after full payment and 100% coverage of all legal requirements.
No storage fees will be applicable until that date.

Lots not picked up by Buyers will be returned to secure storage at Buyer’s expense. In this case storage fees will be applied as follows :

  • Parts & accessories: € 25,- / lot / week
  • Cars and motorcycles: € 50,- / lot / week
  • Armored vehicles, tanks, cannons etc. € 75,- / lot / week

Above mentioned storage fees are excluding VAT.



General Conditions of Sale

General Conditions of Sale Version 2.0 dated 29-04-2022 are applicable.

Bids on internet

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Please note this auction date may change due to unforeseen circumstances.

Model Halftrack (half-track) M9A1 Personnel Carrier with winch
Manufacturer IHC (International Harvester Company) Chicago, Illinois USA
Combat weight 20,500 lbs. (9.300 kg)
Gross weight 19,675 lbs. (8.925 kg)
Crew 10

International Harvester RED-450-B; 6 cylinders in line gasoline

– 143 hp. at 2700 rpm

– 348 ft-lb at 800 rpm

Transmission: Spicer 3641 constant mesh, 4 forward, 1 reverse, front wheel drive & high / low gear

Front:     Semi-elliptic longitudinal leaf spring,

              Combat tires 9.00 x 20 12 Ply

Rear:      1 bogie/track, 4 dual/bogie,

              Tracks: center guide band type

Max. speed: 42 mph. – 68 km/hr.
Dimensions Length:    20.18 ft.        (6,15 m)
Width:        7.29 ft.       (2,22 m) with mine racks
Height:       7.58 ft.       (2,31 m) overall
Wheelbase: 11.92 ft. (3,44 m.)
Electrical installation: 12 Volt
Armament: Gun, machine, cal. .30, M1919A4 (flexible)
Gun, machine, cal. .50, HB, M2 (flexible)
Gun, submachine, cal. .45, M1928A1
Twelve Rifles, cal. .30, M1, M1903, or M1903A1
Note: Armament not included in this agreement
Permit(s): Export permit most probably required
Documentation: Technical Manuals: TM 9-707, TM 9-1707A
Parts List: SNL G-147
Date of Delivery:

June 1943

Note: on current Belgium registration the date mentioned is September 15 1944 which is incorrect

Serial and ORD Nr.: M-9-A-1-1840-ORD-1340 / H542113484(01)
Engine Nr, 26495
US registration USA 40683599 (Current US registration on the vehicle is incorrect. Should be USA 4068923)
Road registration Belgium Road Registration OAEP 964


Robert de Lange 

Internationally respected Halftrack connoisseur and restorer

I have been active for many years with the restoration of Halftracks, specifically the models built by International Harvester. In this area I know many collectors, sources (however they become very rare) and ditto vehicles. I have known this Halftrack specifically for a long time.
With an international halftrack you already have a more special halftrack, but with this m9A1, completely uncut, never used on the civilian or contractor market and in almost 100% original version (so not converted to M5, which happened a lot) you have a vehicle that will attract a lot of attention every MV event. This is a dream vehicle for the true connoisseur and purist. Many original accessories are still present, Technical it is in suburb condition and next to that it is very well restored which makes this a beautiful and highly desirable vehicle. In terms of price, I think this is a very valuable investment which will be reflected in its price.

Experts estimated value:  between  € 100.000,- and € 120.000,- (December 2022)