Seiko Cal. 4540 - 858

The Seiko 4540-858 represents an important milestone in Seiko's 1975 lineup. Powered by the 4540 caliber with 23j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-cbc45386ed9d]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

34mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1975

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