This module has a bracket at the extraction end with four holes to manipulate the potentiometers on the component side of the board. On the face of the bracket there are two white labels. The top label says "MOBa". At the bottom the label reads "415-4", which is also written on a round sticker on the component side.
Manufacturer
Telefunken
Identifying Numbers
Other number
55.3013.307-01
Printed in white at the extraction end on the component side
Other number
5673
Stamped on the edge of the component-side board
Other number
A076-1
Printed in solder on the circuit side near the extraction end
Other number
AW 5500.57Ac
Printed in solder on the circuit side near the extraction end