Seiko Uhrglas 44-20 – Vintage Mineralglas – NOS Taucheruhr 12-hour scale with luminous triangle

12-hour scale with luminous triangle – Glass: double-domed sapphire crystal

1965–1966 – Transition to the Royal series: The Grand Prix line was gradually replaced by the Orient Royal and King Diver models

Chronomaster and the Highness series

TEN TO SEN combines timeless

Seiko Uhrglas 44-20 – Vintage Mineralglas – NOS Taucheruhr 12-hour scale with luminous triangleOriginal Seiko watch crystal with specification 44 20 , from unused old stock (NOS). The packaging is from (Nakanishi Shten) , a traditional Japanese spare parts dealer from Shinagawa, Tokyo. The imprint(Seiko Futbu) refers to older Seiko standard glasses according to Japanese type standards. The handwritten notation 44 20 means: Outer diameter: 44 mm Glass thickness: 2 mm This is a very large mineral glass, such as was used in vintage pocket watches,