Seiko Cal. 4557 - 510

The Seiko 4557-510 represents an important milestone in Seiko's 1978 lineup. Powered by the 4557 caliber with 21j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-0443b813d2f6]

Also known as: UFO, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1978

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