Seiko Cal. 7131 - 549

Seiko 7131-549

Released in 1977, the Cal. 7131 with design code 549 was part of Seiko's domestic market collection. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-ffda1482d5cd]

Also known as: Baby Tuna, Arnie

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
37mm
Case Thickness
9.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
170m
Dial Color
Navy
Jewels
35j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1977

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