The object consists of one (1) logic module with four female, black plastic connectors along the left side. Both sides of the substrate are covered by a gridded field of square-shaped solder marks, and the front with various components. A "parts identification" card dated "28 JUL 1980, JOB/ORDER YJ9735" is extant and remains with the object.
International Business Machines Corporation (IBM)
Incised on one of the four connectors, solder-side
Printed in white on two of the four connectors, component-side