11/19/2012 15:39
Hi again
I have a Zenit-B in M42 made in 1968 with 68 dated black Helios-44. I also have a Zenit-3M of 1966 or 67 in M39 fitted with a Black Helios-44 of appropriate date (I think 1966). I'll have to dig them out to check the serials.
As far as I know the Helios-44 (alloy) was first fitted to the Start in 1958, followed by the Zenit-3 (alloy, M39) in 1960, then the Kristall and Zenit-3M and very early (1966) Zenit-E - all these with alloy M39. I think the Zenit-3M and the Zenit-E were also fitted with the Helios-44 in black M39 in 1966 or 67, and certainly the Zenit-E was fitted with black M42 by 1968 along with the Zenit-B.
As far as later versions are concerned I believe the black Helios-44 was made by Belomo and the black Helios-44-2 in M42 was made by KMZ, the 44-2 being slightly shorter. I think the earlier alloy Helios-44s in M39 were all made by KMZ, but I'm not certain about this.
Hope this is of some use - ATB ChrisS.