Magpie feeding time_c
Helios 44M-7 58mm f2 @f2
This lens was sold to me as Helios 44M-7 but it is not a 44M-7, but an earlier version, probably a 44-6 (serial number 83xxxx)
The lens came from the eBay seller Moscowphoto.
After some investigation I discovered that the lens has been modified and dressed up with a fake front plate saying that it is a 44M-7. Luckily eBay policy protected me and the seller refunded my money.