Seiko Cal. 4431 - 740

The 4431-740 is a sought-after Solar piece from Seiko's golden era. Powered by the 4431 caliber with 21j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-71fac9c8193f]

Also known as: UFO, Rally

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1985

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