PDP-11 - DEC - DIGITAL - 2MB 2 MB MEMORY MODULE - M8637
The readings:
On the board
M8637
Side 1
L1
50-15672-01 C1
Ga6618
2644711
2 MB Q,P-BUS MOS MEM
LPWR
TPB
D.V0
On the metal frame
P/N 1213113
M8651
EC
ASICs on board are 21-24404-01 and 21-22772-01