Seiko Cal. 4431 - 911

The 4431-911 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4431 caliber with 27j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-48a5eca106e5]

Also known as: Tuna, Panda

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1975

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