Seiko Cal. 4428 - 687

The 4428-687 is a sought-after Solar piece from Seiko's golden era. Powered by the 4428 caliber with 19j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-610130535de0]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1983

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