On one side there are several components, including three transistors, a potentiometer, and several resistors. On the other side there is a printed circuit.
Identifying Numbers
Other number
23770 PGF-A-1407A
Stamped in black parallel with the edge of the board
Other number
64190/58
Printed/ handwritten along the side of the board.
Other number
P-C233
Etched in solder on the solder side of the board parallel to the edge