KMZ Helios-44 2/.58

Hi, i have a question about a Helios lens i've never seen before.
Just bought my first Helios 44.Recived it a couple of days ago. It accures that this lens actually is a total BLACK Helios-44 m39 with 8 aperture blades. And now to the best, the lens is stamped with "2/.58" (the dot between 2 and 58). What does it mean? I've search the net and found nothing about the dot. Full name: KMZ Helios-44 2/.58 M39 mount

Can you show us a photo?

Hello and welcome to the forum bassmanroots. I'd like to help you post a pic but I've always had trouble actually getting a pic to show up, it usually just comes up as a link, even though I use the same method on other forums and pics do show. Hopefully someone else can show yuo how.