Seiko Cal. 5637 - 645

Seiko 5637-645

The 5637-645 is a sought-after Solar piece from Seiko's golden era. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-1d2636f9c287]

Also known as: Turtle, Sumo

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
10.4mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Green
Jewels
17j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1982

Related Models

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