Seiko Cal. 6645 - 447

The Seiko 6645-447 represents an important milestone in Seiko's 1976 lineup. With its 18mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-1b0650441308]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1976

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