Seiko Cal. 4540 - 503

The Seiko 4540-503 represents an important milestone in Seiko's 1969 lineup. With its 21mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-94d6d9c6d47d]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

32j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1969

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