Seiko Cal. 6641 - 240

This Hand-Winding model from 1970 features a 46mm PVD Black case. With its 22mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-8d6fc4abf1c8]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1970

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