The run of motors, is only 154 more than it was for the frame; which if we assume that's how many were defective...it makes the Benly a very quality built machine. Over 63,000 produced with only 154 defective says a lot.
The 1959 and the 1966 run numbers could come close to being extrapolated, from the given information if; we had a total run on all of the machines built, without too much difficulty.
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