Seiko Cal. 4428 - 831

The 4428-831 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4428 caliber with 20j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-07cef03f4a1c]

Also known as: Bellmatic, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

80m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1965

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