hifi engine

Goerler Tuner Modul 1975

Hello friends from old hifi!

I´ve got a Görler Tunermodul with 2 IC SO42P (Mixer) an a MC10131 (Flip Flop 160Mhz)
The problem is, the Type number is only readable the last 3 numbers ...131
Does anybody have some information on this module?

Thanx in advance