|438891C||Etched on outer edge of solder side|
|Other number||438892-1B||Stamped on outer edge of component side|
Dimensionsoverall: 1 1/4 in x 5 1/2 in x 8 in
DescriptionObject is a printed circuit board bearing a heat sink on which there are four large power transistors.
Hand written on the back is "R(F)". There is also a square inspection stamp reading "PICO 36".