Seiko Cal. 4440 - 635

The 4440-635 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4440 caliber with 21j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-ccca3ba48da1]

Also known as: Samurai, Navigator

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1999

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