Seiko Cal. 5640 - 688

Seiko 5640-688

This Automatic model from 1972 features a 44mm Gold-Plated case. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-44e541fa5d32]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
12.5mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Cream
Jewels
25j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1972

Related Models

seikata-wm-44e541fa5d32