Seiko Cal. 6631 - 745

The 6631-745 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-ccdd25c85dd7]

Also known as: Pogue, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1980

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