Fuchs Wheel Part Numbers
 

I have a set of "old" 7 X 15 Fuchs wheels. I am a bit intrigued by the part number on the wheels. The are 911.301.020 followed by a 2 digit number in a box. Two of the wheels have the number 11, one has the number 01 (and I am not sure about the last wheel, it is the spare in the car).

Two questions.
- looking on e-bay, all the Fuchs I see advertised have "361" as the second set of digits. Is this specific to the 7 X 15 size, or are my wheels an older design?
- What do the last two digits in the box indicate. Are they just part of the "part number", (but then I am not sure what the difference between the two sets of wheels are - they look the same).

http://forums.pelicanparts.com/porsche-911-technical-forum/324902-fuchs-wheel-all-part-numbers-offset.html

7*15 23,3 911 361 020 41 Black
7*15 23,3 911 361 020 91 Unpainted
7*15 23,3 911 361 020 93 Unpainted
7*15 23,3 911 361 020 11 ’70
7*15 49 R offset 911 361 012 05