Written in solder near the extraction handle on the left side of the solder side oriented with the extraction handle on the top.
overall: 1/2 in x 2 1/2 in x 5 1/2 in
This is a bus driver flip chip module in very good condition. "BUS DRIVER R650C" is printed in solder on the solder side of the card. The board carries six transistors and a number of passive components. There is one quality control stamp on the component side. Two rivets hold the red extraction handle to the board.