Seiko Cal. 0783 - 631

Seiko 0783-631

The 0783-631 is a sought-after Quartz piece from Seiko's golden era. Powered by the 0783 caliber with 31j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-0760d6b68e53]

Also known as: Sumo

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
38mm
Case Thickness
8.3mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Navy
Jewels
31j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1980

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