Seiko Cal. 5664 - 631

Seiko 5664-631

This Quartz model from 1984 features a 41mm PVD Black case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-12442b0ce5d4]

Also known as: Helmet, Flighty

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
41mm
Case Thickness
13.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Navy
Jewels
33j
Frequency
36,000 bph
Power Reserve
55 hours
Year
1984

Related Models

seikata-wm-12442b0ce5d4