From a photo of Rev. 0 board 1070 (A2S1-0800), near locations E11, 12 and 13. There is also one near location C1. SN74LS153N, 7723 date code. Rounded package. Total # on board: 4.
Motorola
Parts for my Rev 0 replica. SN74LS153N, 7716 date code. Rounded package. Used, desoldered.