Seiko Cal. 5631 - 386

The 5631-386 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-febf252c7abc]

Also known as: Monster, Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1997

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