Seiko Cal. 6637 - 980

The 6637-980 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6637 caliber with 25j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-660951c27d97]

Also known as: Silverwave, World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1971

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