Seiko Cal. 6257 - 342

The Seiko 6257-342 represents an important milestone in Seiko's 1968 lineup. Powered by the 6257 caliber with 17j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-e9a51457628a]

Also known as: Sumo, Bullhead

Specifications

Movement

Solar

Case Material

Titanium

Case Width

39mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1968

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