74LS139 Dual 2-To-4 Decoder

Spec Sheet
74LS139_F2

AMD

From a photo of Rev. 0 board 1070 (A2S1-0800), near location F2. 
SN74LS139N, 7733P date code.  Squared-off notch.
Total # on board: 1.

74LS139_F2

AMD

Part for my Rev 0 replica.
SN74LS139N, 7805DK date code.  Rounded notch.  NOS.