Seiko Cal. 5687 - 312

The 5687-312 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5687 caliber with 26j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-3b4ade5503b1]

Also known as: Sumo, Shogun

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1997

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