“J” is for the Jiffy Kodak
The Jiffy Kodak is a fairly common camera with a pop-out front that took roll film.
The Jiffy Koday Six-20 took 2.25 X 3.25 inch photos on 620 roll film.
The Jiffy Kodak Vest Pocket used 127 film.
The other cameras featured in this A to Z Challenge are linked on this page.