Seiko Cal. 5231 - 663

Seiko 5231-663

The Seiko 5231-663 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-80af82b2b0ef]

Also known as: Turtle, UFO

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
9.2mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
150m
Dial Color
Burgundy
Jewels
30j
Frequency
36,000 bph
Power Reserve
71 hours
Year
1971

Related Models

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