Seiko Cal. 4440 - 656

The Seiko 4440-656 represents an important milestone in Seiko's 1977 lineup. Powered by the 4440 caliber with 17j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-d1ffd5d89117]

Also known as: UFO, Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1977

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