Seiko Cal. 4438 - 800

The Seiko 4438-800 represents an important milestone in Seiko's 1971 lineup. Powered by the 4438 caliber with 36j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-a48e69c78715]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1971

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