I found this odd, and amusing. I suspect that someone cleaned the board, accidentally wiped off the numbers, and rewrote 79 as 74.
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what revision board is it?
Rev 04 or ealrier. Canna tell w/o the owner pulling the 6502. Doesn't matter as it cannot have been made in week 45 of 1974.
I asked since earliest IIs logical board had serial number instead of date code.
Oh? Then perhaps it is reasonable.
My observation is that logic board serial numer were in use up till end production of rev 1 boards.
They were housed in shells with non-matching serial number under 10k.
It could be legitimate... see my registry.
https://diskpreservation.com