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I don't know guys, the numbers were always hand stamped, I have seen in some instances where they put each individual number on a jig if the jig was bent on slipped on a worker that didn't care could look like this.
Take a close look at the numbers on the thread pictures, the first two all look the same (probably part of the die), the next three numbers in all the pictures posted are all kind of staggered. and the last two are consistent with the others.
My research showed the stars can be of different size. One set of dies probably wore out quickly and they bought what was available, these were all mass produced (not a Ferrari they probably did the same thing). the newer the dies the crisper the number, the older would be rounder. The real thing to do is find numbers on a motor that were with in 20 plus minus that would tell the story.
how many motors would they punch a day, how many trans would they punch a day etc.
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