Seiko Cal. 4431 - 306

The 4431-306 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4431 caliber with 32j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-8e159e939125]

Also known as: Navigator

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1970

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