Seiko Cal. 6278 - 668

This Spring Drive model from 1974 features a 46mm Hardlex-Coated Steel case. With its 22mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-e28fbc0075b8]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1974

Related Models

• Seiko 6658-841
• Seiko 7127-229
• Seiko 6273-283
• Seiko 4539-466
• Seiko 3820-702
• Seiko 4428-788
• Seiko 6655-487
• Seiko 4593-944
• Seiko 7028-942
• Seiko 6343-679
• Seiko 6339-850
• Seiko 0722-938