Cadillac - 125 - Produced: April - June 1945
Massey - Harris - 160 - Produced: April - May 1945
Total Production - 285 (original order was for 904 in August of 1944)
The production number of 285 is widely publicized. I believe it could be incorrect or an alternate idea below. I show a registration number spread on actual original vehicles of 545. So at minimum we could have 545 built, if we assumed the earliest original picture of an M19 with USA 40190130 were the first and USA 40190675 was the last one built. Which would seem VERY unlikely. One would surmise that the 904 order was one contract and one set of registration numbers assigned to that order. But..... see below
The difference in Registration numbers is caused by a group of registration numbers being supplied to Cadillac and a second group of registration numbers supplied to Massey Harris. But neither of the manufacturers used all the registration numbers due to contract curtailment before the 904 vehicle production contract. I tend to believe that this the actual reason for the USA registration number discrepancy.
Cost Per Vehicle - $
Known USA Registration & Serial Numbers Italic Registration or SN is extrapolated number
|Model||Registration Number||Serial No.||Location||Unit Markings||Misc.|
|M19||USA 40190126||5||Arizona||MV Collector Owned - Cadillac Mfg|
|M19||USA 40190130||Stateside||3-3AA C251||Life magazine pic - No Pads|
|M19A1||USA 40190167||Test / Ordnance||None||Pads|
|M19A1||USA 40190170||49||San Rafeal CA||7-15 AAA - D12||Garbarino WWII Museum|
|M19||USA 40190189||Korean War||15th AA Batt.|
|USA 40190195||Korean War||??? - ???||15th AA Batt. - Artillery Museum|
|USA 40190227||Korean War||3-3AA - B-251||Reg No is hard to read in pic|
|M19||USA 40190231||Korean War||??? - ???||Pads|
|USA 40190235||Korean War||??? - ???|
|USA 40190255||North Korea||??? - ???||Captured Korean War|
|USA 40190260||Test / Ordnance||None||Pads|
|M19||USA 40190241||Korean War||??? - ???||3rd AAA AW - Pads|
|USA 40190282||"Our Lady"|
|USA 40190293||Korean War||??? - ???|
|USA 40190343||Battery A 94th AAA Bt. "Arthritis"|
|USA 40190344||59th AAA Aw Bn (Sp) January 1950|
|M19A1||USA 40190374||Frankfurt Germany||Exercise "Combine" 1951 (Colored Unit)|
|USA 40190644||Test / Ordnance||None||Pads|
|USA 40190658||Korean War|
|M19||USA 40190675||Korean War||82AA||"FLAK"|
|??? B121||"Hells Angels"|
After reading the info provided on Wikipedia I decided I needed to step this up and get this done. The various errors and assumption by whomever wrote what is posted is appalling. If you don't know, DON"T MAKE IT UP!
The M19 is based upon the slightly lengthened chassis of the M24 Chaffee tank. The arrangement of the internal drivetrain is different from the M24 in that the dual Cadillac engines and the transfer case that the dual engines feed into is moved forward to roughly the middle of the vehicle. This makes room for the dual 40mm turret to sit lower and allows for a vast space at the rear of the vehicle under the turret to store extra ammunition. The driver and co driver/ chief of section, sit in an enclosed area with a bulkhead directly behind the seats to divide them from the engine compartment. There is no fighting compartment in the front of the vehicle. Just two seats, drive shafts, Controlled differential (cross drive) and steel boxes for periscopes and misc other components. All major drive train components are the same. Engines, Transmissions, Controlled differential, transfer case, final drives, road wheels, and radiators. The M19 hull is thinner than the M24 and is only ½ plate over the almost the entire vehicle. The front controlled differential cover is roughly half the thickness of the M24 cover.
History of use
There is NO pictorial or paper evidence that the M19 actually saw any combat service in WWII. (I would love to be proved wrong on this). Nothing I have come across shows them in combat use before the end of hostilities in WWII. That being said the early M19s should have been built before the end of WWII.
The M19 was a major asset in Korea. A majority of the pictures show the vehicle being used in a ground defense / offense roll. The advent of the jet had made the quad 50 and the 40mm series of anti-aircraft guns somewhat diminished in their ability to do their intended rolls. The high rate of fire of 40mm projectiles was a game changer in the ability to stop the “human wave” attacks by the North Koreans & Chinese.
The M19 turret assy is NOT the same or interchangeable with the M42 duster of Vietnam fame. These turrets were not reused on the M42 duster as stated elsewhere on the net. The guns are the same and much of the mounting and controls are the same in the turret area. But are not the same complete assemblies.
The M19 was used by Pakistan in unknown numbers. They appear to be the only actual user of the M19 besides the US. Captured vehicles aside.
Difference between the M19 & M19A1 – The M19 was the base vehicle. The M19A1 was an upgraded version of the M19 as follows
The addition of the generator is 100% M19A1 but the added sponsons may not be part of the A1 upgrade and only a MWO (Modification Work Order). I have not seen the actual military paperwork that references what was part of the A1 upgrade or when. It does appear that the aux. generator addition is post Korean War. But the radio sponsons are pre, or during the war.
As with everything on this site I more that welcome additional information or help in clarification. I consider myself to know a great deal about the M24 Series of armored vehicles, but I don’t know it all. I will gladly acknowledge you in anything that goes on the site.
|FM 44-62||Service of the Piece - Twin 40mm Gun Motor Carriage M19||September 5, 1947|
|ORD 9 SNL G-248||Carriage, Motor, Twin 40mm Gun M19A1||September 29, 1950|
|TM 9-1252||40mm Automatic Gun M1 & Dual Automatic Gun M2, Twin 40mm Gun Mount M4||March 5, 1951|
|TM 9-7009-3||2 Cylinder Aux Engine - Wisconsin Model TFT & TFG - M19A1 aux generator||December 2, 1954|
|Ord Pamphlet No. 820||40mm Machine Gun Mechanism, Gun Barrel, and Sight||October 1943|
M24 Chaffee - G200 Series of Vehicles