Seiko Cal. 4431 - 478

The 4431-478 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4431 caliber with 34j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-315cdc71fbdf]

Also known as: UFO, Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1993

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