Seiko Cal. 5637 - 527

The 5637-527 is a sought-after Spring Drive piece from Seiko's golden era. It features a Cream dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-6c013cd92e1a]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

33j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1993

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