Seiko Cal. 5637 - 771

The Seiko 5637-771 represents an important milestone in Seiko's 1983 lineup. It features a White dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-73f6edd8e994]

Also known as: Sumo, Sea Horse

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1983

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