The Argus CR-1 was a fairly sturdy SLR imported from Japan by Argus of USA at a time when the 35mm SLR was coming into a peak of popularity. It uses the "Universal" 42mm screw mount lens system.
This is a nice clean example from my collection, with the original Argus branded 55mm lens.
The week before Thanksgiving I loaded it with a roll of Kodak 400 and took it to the National Museum of Transportation.
Yes, the through-the-lens built-in exposure meter does work, but is a little slow in its response.
The results just came back today from Dwayne's photo lab in Kansas and I resized a batch on my studio computer.

Please click on thumbnails to see enlarged.
All images are ©2019 E.J.Kowalski.
Thanks! Ed