>>3039531picked up a petri 7s rangefinder from a fleamarket today for 15 dollarydoodoos and noticed it has a cold shoe/acc mount instead of a hotshoe.
From what I can tell it has a flash port on the barrel, or I assume that's what it is, I'm pretty new to vintage cameras.
What are these flashes called so I can acquire one.
Anything cool or interesting about these particular cameras?