Seiko Cal. 4540 - 197

The 4540-197 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4540 caliber with 24j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-904fa3261114]

Also known as: Helmet, Arnie

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1980

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