Model 1980:

(Example for the 911 SC 30):
91 A 0 1 3 1597
1 2 3 4 5 6
1 =   Type designation
                  91 = 911 Group
93 = 930 Group (= 911 Turbo)
2 =    Model Year
A = 1980
3  =  Assembly Plant
4     =         Additional data relating to the type
                  1 = 911
0 = 930
5    =   Engine type
                  3 = 911 SC

4 = 911 SC (USA)

7 = 930
6   =   Serial number
                     0001 – 9999
This VIN does not make it evident whether it is a Coupé or a Targa.