Seiko Cal. 6645 - 550

The Seiko 6645-550 represents an important milestone in Seiko's 1989 lineup. Powered by the 6645 caliber with 26j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-7971e089a3f0]

Also known as: Shogun, Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1989

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