Seiko Cal. 6641 - 304

The 6641-304 is a sought-after Hand-Winding piece from Seiko's golden era. With its 21mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-23c70e4cb6bb]

Also known as: Monster, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1971

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