Engine frame number

[Chris Haynes]

All you know is when the engine was made (Engine #2428693 was made on Oct 7, 1929) and within about 3 months when it was installed in your truck.

My early '30 AA is AA3334675 which is a May 6, 1930 build. Bieng as May '30 was the last month of production for the Early '30's it didn't take long for my engine to get into a frame.