Seiko Cal. 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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