Seiko Cal. 4498 - 138

The Seiko 4498-138 represents an important milestone in Seiko's 1981 lineup. Powered by the 4498 caliber with 21j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-435493af048c]

Also known as: Monster, World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1981

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