Seiko Watch Crystal 220W01AL – Tokelaito Mineral Glass – for Seiko Chorus Week – NOS

Original Seiko Tokelaito (トキライト) watch crystal with reference 220W01AL , from unused old stock (NOS).
Tokelaito is Seiko's historical name for a hardened mineral glass that was used in numerous models of the 1960s and 1970s.

This glass was demonstrably used in the rare Seiko Chorus Week series – an elegant vintage collection for which original parts are now almost impossible to find.
The WP marking on the packaging stands for the waterproof version ("Water Proof" type).

The glass is unused and in mint condition. Any signs of age are found only on the original paper packaging.

Technical data:
• Reference: 220W01AL
• Compatible: Seiko Chorus Week
• Type: Tokelaito mineral glass
• Version: WP – Water Proof Type
• Condition: NOS, like new
• Origin: Seiko Japan