Seiko Cal. 6631 - 386

This Hand-Winding model from 1996 features a 37mm Two-Tone case. It features a Green dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-ea3922663873]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1996

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