Seiko Cal. 5637 - 358

The 5637-358 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-1125b750c2e1]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1970

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