Seiko Cal. 5644 - 697

Seiko 5644-697

The Seiko 5644-697 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-dae6bfe0eace]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
42mm
Case Thickness
13.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
Black
Jewels
33j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1979

Related Models

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