Seiko Cal. 5613 - 318

Seiko 5613-318

The Seiko 5613-318 represents an important milestone in Seiko's 1977 lineup. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-b9e045ae7bfd]

Also known as: Monster, Baby Tuna

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
44mm
Case Thickness
8.4mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
Burgundy
Jewels
31j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1977

Related Models

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