Seiko Cal. 6646 - 620

The Seiko 6646-620 represents an important milestone in Seiko's 1966 lineup. With its 21mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-ed7ff51190bd]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1966

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