Seiko Cal. 6631 - 844

The 6631-844 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-81b4c011248f]

Also known as: Panda, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1983

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