Seiko Cal. 4540 - 285

This Spring Drive model from 1984 features a 45mm Two-Tone case. With its 21mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-ece41d7ef3ee]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1984

Related Models

• Seiko 7113-151
• Seiko 6134-394
• Seiko 6124-727
• Seiko 3818-308
• Seiko 4548-273
• Seiko 7035-293
• Seiko 6257-760
• Seiko 4440-784
• Seiko 7148-984
• Seiko 6321-760
• Seiko 6665-810
• Seiko 3895-163