Seiko Cal. 6639 - 444

Seiko 6639-444

This Spring Drive model from 1975 features a 45mm Hardlex-Coated Steel case. It features a Silver dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-6c7d8e97da01]

Also known as: Golden Tuna, Arnie

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
11.1mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Silver
Jewels
25j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1975

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