Seiko Cal. 6251 - 378

The Seiko 6251-378 represents an important milestone in Seiko's 1972 lineup. Powered by the 6251 caliber with 27j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-f1ad53ec1a15]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

27j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1972

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