Nakanishi watch glass 37.48 mm – “Super-Light” – fully waterproof – NOS

Original vintage watch glass from the brand NAKANISH , unused and from long storage (NOS).
The packaging bears the marking完全防水 (kanzen bōsui) – completely waterproof , as well as the glass type 15型andマンスリー (Monthly) , a designation used in older Japanese spare parts series for certain standard shapes.

It is a “Super-Light” watch crystal in the size 37.48 mm .
These glasses were commonly used in Japanese watches from the 1960s to the 1980s and are now rarely available as original parts.

The glass is clear, unused and ideally suited for the professional restoration of Japanese vintage watches.