From a photo of Rev. 0 board 1070 (A2S1-0800), near location B10. There is another near location J13. SN74LS74N, 7720 date code. Squared-off package. Total # on board: 2.
Motorola
Parts for my Rev 0 replica. SN74LS74NDS, 7808 date code. Rounded package. NOS.