Seiko Cal. 4520 - 100

This Spring Drive model from 1981 features a 45mm Hardlex-Coated Steel case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-6dd7bd59797a]

Also known as: Samurai, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1981

Related Models

• Seiko 7087-804
• Seiko 3813-953
• Seiko 3843-321
• Seiko 6686-998
• Seiko 7053-236
• Seiko 6685-249
• Seiko 4597-288
• Seiko 7070-154
• Seiko 4582-909
• Seiko 6643-292
• Seiko 5621-506
• Seiko 6220-291