Seiko Cal. 5278 - 423

This Hand-Winding model from 1966 features a 35mm PVD Black case. With its 18mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-f765f468f134]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1966

Related Models

• Seiko 5616-551
• Seiko 6257-833
• Seiko 5217-424
• Seiko 7139-507
• Seiko 6183-460
• Seiko 3834-234
• Seiko 6662-260
• Seiko 6696-851
• Seiko 4553-927
• Seiko 3828-410
• Seiko 6167-934
• Seiko 7175-515