Seiko Cal. 5637 - 877

The Seiko 5637-877 represents an important milestone in Seiko's 1991 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-9cb8dd71272c]

Also known as: Monster, Bellmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1991

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