Seiko Cal. 4431 - 307

The 4431-307 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4431 caliber with 35j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-64c8cc5ab5d2]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1999

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