Seiko Cal. 4540 - 123

This Spring Drive model from 1975 features a 40mm Hardlex-Coated Steel case. It features a Champagne dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-19da76d5f6e0]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

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