Seiko Cal. 3816 - 640

Seiko 3816-640

This Automatic model from 1987 features a 39mm Titanium case. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-3e5fe8a9de97]

Also known as: Sportsmatic

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
39mm
Case Thickness
12.8mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
28,800 bph
Power Reserve
57 hours
Year
1987

Related Models

seikata-wm-3e5fe8a9de97