320W10GN00 Type I
Brand new reproduction mineral glass replacement. Made out of Hardlex, the original material Seiko used. This crystal is the highest of the three original 320W10GN00 and was used in their watch models from the late 1960s to the early 1970s. These were phased out by Seiko in the early 1970s due to edge chipping and was replaced by the lower profile Type II.
1.5mm Thick at center
This crystal is made to fit Seiko watches:
This listing is for the crystal only, not the display watch