Seiko Cal. 6631 - 436

The 6631-436 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-394eab960eda]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1994

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