What year is engine number 5055415?

Engine 5055415 was one of 4023 engines assembled on June 14, 1921.

Thank you

Will,

That is not exactly 100% for sure. It is 100% sure that the engine number 5 055 415 was included in the engine log range for the entry of Jun 14, 1921 ref page 525 of Bruce McCalley's "Model T Ford."

But on page 524 Bruce notes at the beginning of Jan 1921, "Daily production figures no longer listed in the records. The production figures shown hereafter are the differences between the serial numbers, NOT necessarily the actual number produced."

So what does that mean? Based on the numbers normally assembled at the main plant, you engine probably was assembled at the main plant on Jun 14, 1921. But it may not have been. On pages 515 to 523 Bruce also includes the serial numbers (not engines) that were shipped to the Long Island Branch Assembly plant starting in Jan 1918 and ending Dec 1919. (The process continued but Bruce stopped reporting the details.) Those blocks of serial numbers ranged from as low as 50 to a high of 800 in a single day (The 800 day was Jul 1, 1919 when 1935 other serial numbers were also used and probably assembled at the main plant. So on that day about 30 percent of the serial numbers were produced later at the Long Island factory. And blocks of serial numbers were also shipped to other branches that assembled engines. On page 526 they have listed 15,000 numbers sent to Cork, Ireland on Sep 20, 1921. They listed just under 4000 other serial numbers that day. The large numbers sent to Cork, Ireland and later to Manchester, England were months rather than days apart.

And of course if the engine block was replaced by one of the Ford dealers, they had been instructed to stamp the original engine number on the replacement block.

Respectfully submitted,

Hap l9l5 cut off