Seiko Cal. 6638 - 967

The Seiko 6638-967 represents an important milestone in Seiko's 1982 lineup. Powered by the 6638 caliber with 34j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-01336768d6b7]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

34j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1982

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