Seiko Cal. 4438 - 251

Released in 1986, the Cal. 4438 with design code 251 was part of Seiko's domestic market collection. Powered by the 4438 caliber with 34j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-8e2076f39726]

Also known as: UFO, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1986

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