Seiko Cal. 6638 - 131

The 6638-131 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6638 caliber with 24j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-8b1afcc77827]

Also known as: Bellmatic, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1977

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