Just out for my morning stroll and stopped at a weekend flea market. Therein sat an Agfa Isoly that I took to be a 6X6 because of the size and square VF. Looked it over carefully, very clean inside and out including the 60mm f3.9 Apotar lens. Front element scale focus smooth and well damped. The little Prontor looked about right at all speeds.
Keen!, I thought, a leightweight 6X6 wide angle camera. Don't know why when I opened the back I didn't notice the film gate was a tad small for that size.
Got it home, thought I'd load a roll and only then noticed the red window.
"Isn't that supposed to be in the middle of the back?"
"Hey, is this a 4.5X6"
Look at the film gate again, "Nope, it's square alright."
"Wait a minute." Grab the ruler "One and five eights by one and five eights!" "Cripes! It's a lousy 4X4." Slaps forehead, feels real dumb.
PS; Nope, the film gate is not just an insert that snaps out. I already checked that.