Seiko Cal. 4550 - 522

The Seiko 4550-522 represents an important milestone in Seiko's 1975 lineup. Powered by the 4550 caliber with 20j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-25f0d8dbb235]

Also known as: Monster, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

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