Seiko Cal. 4439 - 623

This Hand-Winding model from 1968 features a 38mm Two-Tone case. Powered by the 4439 caliber with 20j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-e713f007a8b9]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1968

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