Seiko Cal. 4540 - 390

The 4540-390 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-ec83f21d243a]

Also known as: Crown, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1990

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