Seiko Cal. 6131 - 604

This Hand-Winding model from 1998 features a 35mm Titanium case. Powered by the 6131 caliber with 23j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-066090842ecc]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1998

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