International Business Machines (IBM)
||Stamped next to "IBM" on the component side on one of the modules
||PECO number stamped in black on the component side of two of the cards
||Engineering change number stamped on the component side of one of the cards
||Printed on the solder side of each card
overall: 1 1/4 in x 5 1/4 in x 4 1/2 in
There are three Standard Modular System (SMS) cards. Each has a three coiled transformer in the middle. There are also several resistors and diodes on the board.
Gift of Paul Pierce