Seiko Cal. 6381 - 628

This Spring Drive model from 1965 features a 35mm Titanium case. It features a Silver dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-bc3b2566d8a2]

Also known as: Monster, Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1965

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