Seiko Cal. 6631 - 459

This Spring Drive model from 1989 features a 41mm PVD Black case. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-aa093675f22e]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1989

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