The Pentaflex SL was manufactured in 1967 in Dresden, East Germany, by Kamera-Werkstatten Guthe und Thorsch. This was the same company that was making the Praktica line of cameras, and this one is very similar to some Praktica models.
The lens I attached for this photo set was made in Russia, U.S.S.R., and is normally mounted to one of my Zenit SLRs.
They use the m42 type of Universal Screw Mount, sometimes referred to as "Praktica Mount" or Pentax Screw Mount."
Notice that even though these products came from behind the Iron Curtain, fact that the engravings are in English suggests they were intended for export.

I purchased this camera in the 1990's at an outdoor flea market in Mayville, New York, at the north end of Lake Chautauqua. It was my first Eastern Bloc camera.
Shortly after I brought it home one of the shutter curtain take up roller shafts snapped into two pieces. I was able to disassemble the camera, repair the shaft using soft solder, re-glue the curtain, and put it all back together again. The repair has held.
The actual tested shutter speeds are somewhat slower than those indicated on the dial, because after my repair I did not want to overly strain the soldered joint and so adjusted the shutter speed spring tensions lower.

Last week the camera came down off the shelf where it had sat for more than twenty years.
Loaded with a fresh roll of Kodak 200 color print film it got another run, with frames exposed in Sunset Hills and Kirkwood, Missouri, and here in the front and back of my home in High Ridge.

I processed the film right here yesterday in Caffenol using my favorite recipe. Ingredients are all safe, including washing soda, Vitamin C powder, instant coffee, and table salt.
This was my fourth venture doing a roll with Caffenol. I have kept my basic recipe the same, varying developing time and fixer time.
This time I had it in the developing mix for 7 minutes, and in the salt fix mix for 3 hours.

Caffenol treats color film as a monochrome. The sepia tone was added by me in software.

Please click on thumbnails to see enlarged.
All images are ©2020 E.J.Kowalski.
Thanks! Ed