Typing your VIN into a search engine such as Google, Yahoo, or Bing. Todd Paisley's 2004 unearthing of Service Bulletin 328 dated 18 October 1956 and titled 'Identification of Willys Vehicles' provides pretty strong evidence that the 'OB' serial number prefix used briefly in 1954 indicated simply the standard 'Open Body.'. it would require writing a 'decision' algorithm that would compare all the data entered against a list of 'known original' parts. Serial number database Willys MA CJ2A CJ3A CJ3B (more other stuffs on the CJ3B) FORD GP/GPW and WILLYS MA/MB. Various histories of Willys Jeep vehicles including films, roles in pop culture, overviews, photos and specs. In this case we could assume 5,000 consecutive serials got the prefix MC then the next 2,000 may have gotten the prefix 3J and then the next 1,000 the prefix MC. The new 'crossover tube' did not have a dimple in the top which was previously needed for clearance between the tube and the top radiator support rod. MB,GPW and CJ2A parts are all throughout the vehicle. Generally, the block casting numbers are found on the right side of the engine block below the distributor.

Cj2a serial number