Seiko Cal. 5648 - 137

Seiko 5648-137

The Seiko 5648-137 represents an important milestone in Seiko's 1973 lineup. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-52d3748e5bc3]

Also known as: Bullhead, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
8.8mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
110m
Dial Color
Champagne
Jewels
23j
Frequency
28,800 bph
Power Reserve
70 hours
Year
1973

Related Models

seikata-wm-52d3748e5bc3