Seiko Cal. 6636 - 877

Seiko 6636-877

The 6636-877 is a sought-after Automatic piece from Seiko's golden era. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-6e222e9f1f0e]

Also known as: Turtle

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
10.1mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Black
Jewels
17j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1971

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