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?

[76-914]

[chmillman]

Just checking in here, have now acquired a 914/4 in very good condition, and was curious about the date of manufacture...

The serial (VIN) number starts with 47429, so according to this site, it is listed as a 1974. However, according to the chassis number decoder, it was apparently manufactured in late-ish 1973. The chassis number is 4449600. As it was manufactured in 1973, I guess I take the 1973 calendar for the exact date? i.e.

44=week 44
4=Thursday
9=Karmann
600=100th car made on that day

By the 1973 calendar, Thursday in week 44 was the 1st of November.
Did I get that right?