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?

[Larmo63]

The VIN and the chassis numbers are different. The VIN is located on the driver's side windshield A pillar plate, on the sticker inside the driver's side door below the striker, (which also states the month/year of build,) also, on top of the right fender under the hood, and on an aluminum plate on the side of the inner front right fender, inside the front trunk.

The black and aluminum plate inside the driver's door to the front, is the chassis number and that same number will also be on the rear trunk floor on most cars. Different cars/years are stamped in different areas of the rear trunk.

My chassis plate says: "Made in Western Germany." The lower part of this plate also has stamped in it the original color code of the chassis.