M30 camshaft spec?

[pat cooks]

I bought this used early M30 camshaft together with triple sidedraft solexes manifold and a large cast alloy ALPINA airbox, all long sold except the cam, it was supposed to be an Alpina cam , anyone any idea what the two blue rings mean, it has a 7 stamped on the back end,

 

[sfdon]

From memory....

7 cam is factory late 70's cam jetronic
3 is coupe cam
m is 260 duration USA cam
k is euro and then USA Motronic
H is one year only strange rotor cam
Note that even the k cam has lobes for fuel pump.