Seiko Cal. 5677 - 721

The 5677-721 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5677 caliber with 19j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-f642200b51f9]

Also known as: UFO, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1972

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