Seiko Cal. 6645 - 186

The Seiko 6645-186 represents an important milestone in Seiko's 1988 lineup. Powered by the 6645 caliber with 24j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-188c822d471c]

Also known as: Bullhead, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1988

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