Seiko Cal. 6641 - 713

The Seiko 6641-713 represents an important milestone in Seiko's 1965 lineup. With its 20mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-bc0bc9941676]

Also known as: Pogue, Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1965

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