Seiko Cal. 4431 - 392

The Seiko 4431-392 represents an important milestone in Seiko's 1968 lineup. Powered by the 4431 caliber with 23j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-b84f31f9bca6]

Also known as: UFO, Crown

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1968

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