Seiko Cal. 6278 - 540

This Automatic model from 1976 features a 37mm Stainless Steel case. Powered by the 6278 caliber with 28j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-636ca5a1c8d5]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1976

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