Seiko Cal. 5640 - 951

Seiko 5640-951

This Spring Drive model from 1969 features a 38mm Hardlex-Coated Steel case. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-4d6a76c60884]

Also known as: Sea Horse

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
38mm
Case Thickness
12.4mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Black
Jewels
17j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1969

Related Models

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