Seiko Cal. 4540 - 304

The Seiko 4540-304 represents an important milestone in Seiko's 1987 lineup. With its 21mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-ad2f5e385b21]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1987

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