Seiko Cal. 5637 - 787

The Seiko 5637-787 represents an important milestone in Seiko's 1974 lineup. Powered by the 5637 caliber with 32j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-8af5bbe2a88c]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1974

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