Seiko Cal. 5661 - 440

Released in 1977, the Cal. 5661 with design code 440 was part of Seiko's domestic market collection. Powered by the 5661 caliber with 34j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-12bc59077eae]

Also known as: Silverwave, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1977

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