Seiko Cal. 6641 - 887

The Seiko 6641-887 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 10.3mm profile, it sits comfortably on most wrists. [seikata-wm-1b47a0e44d1f]

Also known as: Silverwave, Arnie

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1971

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