Seiko Cal. 0731 - 313

This Hand-Winding model from 1999 features a 38mm Titanium case. It features a White dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-c78d391c4ee7]

Also known as: Monster, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1999

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