Seiko Cal. 5637 - 409

The 5637-409 is a sought-after Automatic piece from Seiko's golden era. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-993fff7eaace]

Also known as: Sea Horse, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1970

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