Seiko Cal. 5663 - 667

Seiko 5663-667

The 5663-667 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-6c66a3b5d8a4]

Also known as: UFO, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
15.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
150m
Dial Color
Navy
Jewels
31j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1983

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