Seiko Cal. 4588 - 637

The Seiko 4588-637 represents an important milestone in Seiko's 1979 lineup. Powered by the 4588 caliber with 25j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-f3d1b3dfc66b]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1979

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