Seiko Cal. 5630 - 131

The 5630-131 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-63ad1f833513]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1997

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