Seiko Cal. 4520 - 812

The Seiko 4520-812 represents an important milestone in Seiko's 1968 lineup. Powered by the 4520 caliber with 21j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-7fcf098f2bad]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1968

Related Models

• Seiko 5624-561
• Seiko 0753-384
• Seiko 5246-582
• Seiko 7047-193
• Seiko 6148-927
• Seiko 7097-517
• Seiko 7070-921
• Seiko 7168-342
• Seiko 6191-150
• Seiko 0732-733
• Seiko 6269-524
• Seiko 3834-940