Of cause, Zoom. I used "home made" expression to loosely. I'm sorry about this. You are right; this turret, and all of the turrets we sow here, and most of the other modifications on the cameras are made on the factories, in worse case in repair shops. It’s unlikely (but possible of cause) that such staff made inside the KMZ because factory security - "ïðîõîäíàÿ". If you get cut you can end up in jail, and onsure, you and all you department will loose monthly bonuses. Much easy to do this let say at shampoo factory. They have same or better machinery then KMZ to make molds, and security is only worry that someone taking home a bottle of shampoo. Much easy and safer do turrets in shampoo factories then on mechanical plants indeed. From KMZ I would expect electronic components, soup, carrying bags, bearing, home made radios, Christmas lights, and so on. Very much in favor was bread making factories. They have everything from paint to lasers. And security was loose there, who will take home bread? I can write a poem about hidden trade what existed in USSR. But it for other times and for other forums, I suppose
I salute to people who made such staff and then find the ways to get it home under noses of communist bosses and KGB informers. Thank to this smart and brave man we can enjoy now such diamonds of engineering as this turret. Imagine if this tinkers was noticed, and appreciated, and helped, and they work will be put for production and they was compensated monetary. May be then Russian camera industry would not be in such despair today?