Seiko Cal. 6331 - 930

This Hand-Winding model from 1977 features a 38mm PVD Black case. It features a Black dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-bbe2bfdfcbab]

Also known as: Sea Horse, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

24j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1977

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