Seiko Cal. 6631 - 450

This Spring Drive model from 1999 features a 42mm Stainless Steel case. Powered by the 6631 caliber with 23j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-bf4a2a040467]

Also known as: Navigator, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1999

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