Seiko Cal. 6644 - 725

This Spring Drive model from 1999 features a 39mm Stainless Steel case. Powered by the 6644 caliber with 20j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-3b0fbb336e18]

Also known as: Helmet, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1999

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