Seiko Cal. 4540 - 559

This Spring Drive model from 1967 features a 45mm Two-Tone case. With its 21mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-8c7c75f7a59f]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1967

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