Seiko Cal. 6257 - 186

This Hand-Winding model from 1987 features a 39mm Stainless Steel case. Powered by the 6257 caliber with 24j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-dfd030fb5496]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1987

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