The Seagull 203 is a rangefinder camera for rollfilm. Its first version was the Shanghai 203 of 1963. Unlike its successor 203-I it doesn't have a flash hot shoe. But it has a coupled EV scale which was omitted at the 203-I.

Before loading a new film its exposure frame format can be changed from 6×6 cm to 4.5×6 cm and vice versa by means of hinged mask parts. The lens/shutter-unit is an old-style construction, with self-timer and all selection rings for exposure settings. Even the shutter has to be cocked with a lever on that unit. Only the shutter release button has "a modern position" on top of the camera. The rangefinder is coupled to the distance selection ring around the lens and superimposed to the optical viewfinder. Another modern feature is the film advance lever.