Seiko Cal. 4521 - 740

The Seiko 4521-740 represents an important milestone in Seiko's 1976 lineup. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-883516a0e4c9]

Also known as: Emperor, Flighty

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

100m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1976

Related Models

• Seiko 4557-382
• Seiko 5247-301
• Seiko 6645-517
• Seiko 6342-298
• Seiko 0747-489
• Seiko 6660-823
• Seiko 3833-705
• Seiko 6374-348
• Seiko 0733-958
• Seiko 6198-864
• Seiko 6386-464
• Seiko 6129-339