please help identify crawler

[Ray]

Not really, although that probably is a date it is more and likely a mold date, like when the mold was last updated.

[pipefitter72]

is there any way to tell what year this tractor is besides the engine numbers?

[Ray]

Not accuratly without the original engine, however, one question answered might help in getting close: Does the main frame continue back and is sandwiched (bolted in) between the final drive housings and the transmission case?

[John Schwiebert]

One thing sure, is . the tractor was built after the date on the axles. 1951 is also the year the OC-3 was introduced. I need to look up approximately what month the OC-3 was introduced