Seiko Cal. 6637 - 266

The 6637-266 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6637 caliber with 19j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-a47f216b5b7e]

Also known as: Rally, World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1973

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