Found on sticker at extraction end on reverse side
B8 900 00 X3
Printed in white on underside of middle layer of raised circuit.
Printed in raised letters on raised circuits on obverse face
overall: 1 1/4 in x 4 3/4 in x 7 1/8 in
This logic module consists of four raised circuits with components on their reverse sides. The components are seperated from the board by a plastic substrait, which is also raised above the board. On the reverse side there are several wires running accross the module.