Seiko Cal. 6616 - 631

This Spring Drive model from 1986 features a 40mm Titanium case. Powered by the 6616 caliber with 20j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-ff13aaa08415]

Also known as: Shogun, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1986

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