seiko chronometer center second 1950s Chronograph The crown is original

The crown is original

Model: Crystron 150m Diver

and an orange dial was later added

The Citizen’s legendary diver “Chronomaster 500m Diver” is based on this watch

The GMT-Master II was introduced in 1982 as the successor to the GMT-Master I and is capable of displaying three time zones

seiko chronometer center second 1950s Chronograph The crown is original(3)19501 30mm Brand: SEIKO Model: Chronometer Center Second Ref: N A Serial: 101038 Year: 1950s Movement: Manual 10 Jewels Case: 30mm Material: CRP SS Strap: 16mm Includes: Leather Strap Description SUPER() 195010 510020 30mm 2 Chronometer() 3 5 Warranty OH4 OH6() Description In Japan, the first center second watch was revealed in 1950 and this watch was also produced in early 1950s. Beautiful dial with Breguet numerals and blue steel hands. Small