Seiko Cal. 6151 - 321

This Hand-Winding model from 1975 features a 40mm Titanium case. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-3381714d9dcd]

Also known as: Monster, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1975

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