This is the cyclops crystal.
4414101 and 76134 are printed on the back of the case. P7 on the counterweight. E338 is printed inside the case. From my research and measurement the diameter is 30mm.
In reply to I need measurement. I have a by JP
I'm new to this forum and am not quite sure if i'm doing this correctly, but here goes. I have a similar need for a crystal. Information on the watch: Super Seville model (circa 1980?), cal. ETA 2834-2, stamped on inside of back cover "E338", "stepped" crystal (29.5mm and 30.5mm), uses a white gasket which also holds bezel, not sure if it's mineral glass or sapphire. Local watchmaker says it's a "Rolex-type", whatever that means. Any help or direction would be greatly appreciated!
In reply to Hi Rod. I'm looking and may by JP