Seiko Cal. 6631 - 521

This Kinetic model from 1978 features a 41mm Two-Tone case. It features a Black dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-ae603ced9ef7]

Also known as: Turtle, Bellmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1978

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