This object is a "MEMORY CONTROL BOARD" module from a KL10. It is a standard 6 high DEC format multilayer (probably 4) PCB. It has green and white rework wires on both component and circuit sides.
Manufacturer
Digital Equipment Corporation (DEC)
Identifying Numbers
Model number
M8544
Stamped in red on front of board stiffener
Model number
M8544
Printed on barcode sticker on bottom of board stiffener
Model number
M8544
Etched near front edge of circuit side of board
Other number
5011913D
Etched near front edge of circuit side of board
Other number
MR264A077 A
Printed on barcode stickers on bottom of board stiffener