Seiko Cal. 5681 - 633

This Spring Drive model from 1993 features a 45mm Titanium case. Powered by the 5681 caliber with 23j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-25a930952620]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1993

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