Seiko Cal. 6663 - 694

Seiko 6663-694

The 6663-694 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-6f15ed525607]

Also known as: Tuna

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
39mm
Case Thickness
14.7mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
Burgundy
Jewels
26j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1978

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seikata-wm-6f15ed525607