Hello,
I have just bought a Fed 2 with a serial number beginning by "A" as a prefix. It's not the first time I see one of these Fed 2, but they are not common.
Do you have one of these Fed?
But why this A ?.. Fed usually don't use letters in their numberings...
I wonder if it couldn't be an intermediate decision of the factory after the first million of Fed 2-s: the first Fed 3-s, in production since 1961, were already using numberings beginning by 100xxxx. It would explain too the very quick jump for the Fed 3-s from 1 million to two... to let some space for the Fed 2-s.
Of course, I think of Kiev-s too: some of them have A or B prefix.
Anyway, there are always unsolved mysteries, even with cameras that don't worth much!
Amitiés. Jacques.