Seiko Cal. 6631 - 144

The 6631-144 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6631 caliber with 23j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-391dc686e7dd]

Also known as: Pogue, Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1971

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