Hi Lenny,
I was referring to the lever which disengages the mechanism when you rewind the film.
It looks very like my NKAP's. It would be very interesting to know if these two levers were made by the same maker... But it's a detail.
I am not in the lens, but the two screws and the coating let me think that it should be true. And right, the s/n is too much on the right and the "N" a bit too high. Variations for the beginning of the series or not?
When there is a Fed-Zorki, Alexey is not far, generally!

So....
Amitiés. Jacques.