Seiko Cal. 3870 - 731

Seiko 3870-731

This Automatic model from 1995 features a 37mm PVD Black case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-9281ae05065b]

Also known as: Helmet, Flighty

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
37mm
Case Thickness
9.4mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
White
Jewels
17j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1995

Related Models

seikata-wm-9281ae05065b