Seiko Cal. 6641 - 646

This Hand-Winding model from 1972 features a 35mm Two-Tone case. With its 21mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-cf5daf019fc8]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1972

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