74LS161 Synchronous 4-Bit Binary Counter

Spec Sheet
74LS161_D11_12_13_14

AMD

From a photo of Rev. 0 board 1070 (A2S1-0800), near locations D11, 12, 13 and 14.
SN74LS161N, 7738K date code.
Total # on board: 4.