Seiko Cal. 4540 - 420

The 4540-420 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-f57e2c26bf97]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1989

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