The Canon Canonet 28 was manufactured in 1968. It was the budget model of the Canonet range, made from mostly plastic. It is a programed auto exposure camera using a selenium cell around the 40mm f/2.8 lens. No rangefinder just click stop zone focusing marked by symbols in the viewfinder and a distance scale on the lens barrel. No flash shoe just a flash cube socket which I think requires the two AAA batteries (the compartment is in the camera base) because the meter and shutter seems to work OK without them.

Fun with this camera.
Just needed a clean.

Camera Specs.
Lens: 40mm f2.8, 4 elements in 3 groups.
Shutter: Seiko LA. Automatic program only. From f/2.8 at 1/30sec to f/22 at 1/250.
Exposure meter: Selenium cell EE (meaning Electronic Eye) exposure meter. Program shutter exposure only.
Film speed index: ASA 25 - 400.
Viewfinder: Bright viewfinder, Marked with parallax correction marks.Has two needles one showing focus setting and the other the camera auto selected shutter speed in pretty colours!!
Flash Synchronization: None, just a flash cube socket!
Self timer: None.
Film Loading: Standard slotted take-up spool.
Film Winding: Single operation 127 degree winding lever type.
Size: 134mm x 79mm x 59mm.
Weight: 500 grams.