Seiko Cal. 6231 - 730

This Spring Drive model from 1965 features a 43mm Titanium case. It features a Navy dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-7b4722e3f9ef]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1965

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