I recently cleaned, restored, and adjusted a Colormatic version of an Argus C3 from my "inbox" of old cameras.
Argus badge on front, Colormatic settings on dials, normal Cintar f:3.5 / 50mm lens, and 5 speed dial.
This one also has a factory installed accessory shoe, three screw version, and came to me with an aftermarket Tiffen-made auxiliary aperture dial and filter holder / front hood assembly, in black, allowing the f:stop values to be read from above.
I loaded it with a 12 exposure roll of Walgreens Studio 35 print film in ASA 400, here are some results from around the house.
In bench testing I knew that this one did not sync well for electronic flash, the blades open too late. The image with the mirror/towel rack with garland was shot with a small Vivitar auto electronic flash, at 1/25 second and f:11. Note the shadow vignetting from the aperture blades.
All the rest of these images were shot with available light. Indoor shots were in the neighborhood of f: 4 or f:5.6 at 1/10 second, handheld (steady hands usually).
All images are ©2006 E.J.Kowalski.