Found printed in silver near top right of reverse side of module
-3V K 37
Found stamped on top of black rectangular component on front middle of module
overall: 2 1/2 in x 5 1/2 in
This is a B113 module with a green board and a blue plastic extraction handle attached by two rivets.The component side is marked with four inspection stamps, two round and two square; "FLIP CHIP" can be read faintly through board, between the rivets. Throughout the green board the letters "NP" are marked in red. "DIODE GATE B113C" is stamped on the solder side.