There is a bracket secured to the front of the module with a power transistor in the center. Above that are other components. 49317 is printed on the solder side.
Date
1959
Manufacturer
International Business Machines (IBM)
Identifying Numbers
Other number
337
Stamped into the board along the edge on the component side in the corner
Other number
ALY 370552
Stamped into the board along the edge on the component side
Other number
ALY A2K28
Handwritten on a piece of blue painter's tape on the solder side of the module
Other number
EC 116183
Stamped into the board along the edge on the component side
Other number
YBK13KUL1
Stamped into the board along the top edge on the component side
