Seiko Cal. 6646 - 644

The Seiko 6646-644 represents an important milestone in Seiko's 1986 lineup. Powered by the 6646 caliber with 24j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-5adbf81740cf]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1986

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