Seiko Cal. 5278 - 564

Seiko 5278-564

This Hand-Winding model from 1966 features a 42mm Hardlex-Coated Steel case. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-f53fe502c604]

Also known as: Helmet, Sea Horse

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
8.8mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
110m
Dial Color
Navy
Jewels
27j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1966

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