Seiko Cal. 4548 - 405

The Seiko 4548-405 represents an important milestone in Seiko's 1972 lineup. Powered by the 4548 caliber with 31j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-bff1aaa9639a]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1972

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