Seiko Cal. 6628 - 578

Seiko 6628-578

The 6628-578 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-7528d88d7e66]

Also known as: Bullhead, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
13.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
50m
Dial Color
White
Jewels
30j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1981

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