Quote Originally Posted by AgX View Post
There are two symbols: the one in front of the lens name and the other, a 1 in a rounded triangle, on the shutter.

The latter is one of a range of symbols indicated the product quality within production of GDR goods. In this case indicating good quality on par with the average of world production.
I wasn't sure whether it denoted a certain quality of production, though that would make sense. I was familiar with the triangle-1 mark from looking at East German-produced firearms.

I have a Certo-6 with the same marking, and with a Tempor shutter. I don't know much about these shutters, other than that I understand they're Synchro Compur copies. Haven't used the camera enough to evaluate how good the shutter is, other than to note that the self-timer doesn't work.