Seiko Cal. 5637 - 520

The 5637-520 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-5b52b17fbf44]

Also known as: Sumo, Goldfeather

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1998

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