Seiko Cal. 6633 - 531

Seiko 6633-531

The Seiko 6633-531 represents an important milestone in Seiko's 1970 lineup. It features a Black dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-ee1d7ddeeb67]

Also known as: Baby Tuna, Arnie

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
35mm
Case Thickness
8.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
70m
Dial Color
Black
Jewels
21j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1970

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