chassis number decoder, is this right? Options

[914 RZ-1]

So I'm looking for something that will tell me what the numbers mean on the chassis number. I find the "chassis number decoder" info shown. However, it doesn't seem to work. Am I missing something? My chassis number-found on the inside front fender on a plate (is this supposed to be the same as the VIN number?)-is 472 2910951, door sticker says car was built in Feb '72.

So using the decoder it seems my car was built in the 29th week of the year (29) on Monday (1) at the Karmann factory (9) and it was the 51st car built that day.

By the way, the chassis plate states the car was "Made in Germany", but there was a West and East Germany back then, so what gives?

[Craigers17]

Looks like the made 21,580 914's in 1972, not including 240 sixes. So if you base that on a 5 day work week, roughly 261 work days, they would have pumped out roughly 82.68 cars/day if my math is correct.

But who knows? Did they work 5 days a week, 6?, 7? Did they manufacture cars in all 12 months? Were the same # of cars produced on a Monday as a Friday?

If Bob can install "x" amount of tail light housings in 8 hours, and Bill can install "y" amount of door handles in 5 hours, how many front bumper caps can Mary install in 4 hours, provided Raul can install 21 antennas in 7 hours?
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[Front yard mechanic]

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