They may have started putting them into the 45's after the lit. Jack has.
If you are doing a factory resto, silver background flats are the most common I have seen. Most pumps then used aluminum faces.
White is #2, #3 black, black mostly in the later ones,45,49
Some early computers had red tenths wheels some had pint wheels.
If you are planning on motorizing, use perma-vis.
Veeder Root Rebuilds.....since 1987
Veeder Root Identification CD
Gas Pump Clock Repair