overexposed again

bought this cam on ebay for 4,62€. it uses 127 film and has a 4x4 format. you have almost no settings. the only thing you can chose is the aperture: 8, 11, 16 and 22.
i like the patina touch that makes the shots look like they´re 40 years old. but does that mean in 1967 or when the cam was produced they looked like being of the 20s?