Seiko Cal. 6397 - 900

This Spring Drive model from 1999 features a 45mm Titanium case. Powered by the 6397 caliber with 21j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-3420c57df429]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1999

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