Seiko Cal. 5637 - 770

The Seiko 5637-770 represents an important milestone in Seiko's 1991 lineup. Powered by the 5637 caliber with 24j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-04b7e815b576]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1991

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