This object is a "ADDRESS AND TIME" module from a KL10. It is an extra deep 6 high DEC format multilayer (probably 4) PCB. It has front and rear stiffeners. Both sides have green and white change wires.
Manufacturer
Digital Equipment Corporation (DEC)
Identifying Numbers
Model number
M8577
Printed on barcode sticker on bottom of board stiffener
Model number
M8577
Etched near right edge of circuit side of board
Model number
M8577
Stamped in red on front of board stiffener
Other number
5012901C
Etched near right edge of circuit side of board
Other number
MR2131A450 C
Printed on barcode stickers on bottom of board stiffener
