Seiko Cal. 4438 - 140

The Seiko 4438-140 represents an important milestone in Seiko's 1992 lineup. Powered by the 4438 caliber with 24j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-10bbd1037f54]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1992

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