To Decode the VIN
WPO = World Manufacturer code (West Germany, Porsche).
ZZZ = filler for Rest of the World (RoW) models (US models have something called a VDS code here).
'nn' = first two digits of the model designation.
Z = filler.
M = model year (series begins. A=1980 (chassis numbers).
B=1981 (first year of VIN code), etc and omits "I" and "O". 2000=0 (zero), 2001=1 etc).
S = place of manufacture (Stuttgart).
8 = third digit of model designation. 4 = model sub-type (eg in the 80s, "4" designated the RoW mainstream 928S/S4 model and "6" the USA, Japan and Canada model.
0001 = car's serial number.
Glenn Evans '80 928 'S' look, 5 speed
Some addenda for 'To Decode the VIN':
1. For those early cars which pre-date Porsche model year 1981:
2. For those cars with VINs commencing "WPO":