The Seagull 203-I is a rangefinder camera for roll film. Before loading a new film its exposure frame format can be changed from 6×6 cm to 4.5×6 cm and vice versa. Its design is a style mixture of old-fashioned folding camera body and modern manual rangefinder camera top with hot shoe and long film advance lever. 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, and the rangefinder is coupled to the distance selection ring around the lens.