Seiko Cal. 4428 - 764

The 4428-764 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4428 caliber with 18j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-38670d331b53]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1966

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