Seiko Cal. 5240 - 812

The Seiko 5240-812 represents an important milestone in Seiko's 1975 lineup. With its 19mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-d389caab7a05]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1975

Related Models

• Seiko 6363-571
• Seiko 3822-209
• Seiko 6249-316
• Seiko 4554-190
• Seiko 4486-755
• Seiko 7015-731
• Seiko 0754-698
• Seiko 5251-950
• Seiko 3850-282
• Seiko 7074-409
• Seiko 7158-885
• Seiko 4462-470