Fairchild
From a photo of a real pre-NTI Apple-1.
9N00/7400 PCF.
7428 date code.
Total # on board: 3.
Signetics
From a photo of a real NTI Apple-1.
N7400A.
Vertical labeling, stretched “S” logo, no S below part number.
Total # on board: 3.
Fairchild
Desoldered.
Exact date code and labeling match of pre-NTI.
Fairchild
Unused.
Close date code to pre-NTI.
Fairchild
Unused.
9N00/7400 PCF in smaller lettering. ’74 date code.
Fairchild
7400 PC F. 7602 date code.
Signetics
N7400A.
Close date code to NTI.
Vertical lettering, no S below part number.
Signetics
Desoldered.
N7400A, vertical lettering with S below part number. ’75 date code.