Seiko Cal. 6646 - 737

This Spring Drive model from 1986 features a 42mm PVD Black case. With its 22mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-d84dd1ce7528]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1986

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