Seiko Cal. 5278 - 673

Seiko 5278-673

The Seiko 5278-673 represents an important milestone in Seiko's 1977 lineup. Powered by the 5278 caliber with 31j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-217e6f41d375]

Also known as: Tuna, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
8.6mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
80m
Dial Color
Green
Jewels
31j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1977

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seikata-wm-217e6f41d375