Seiko Cal. 6638 - 584

Seiko 6638-584

This Kinetic model from 1980 features a 42mm Stainless Steel case. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-58d4d9a7901d]

Also known as: Helmet, World Timer

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Navy
Jewels
18j
Frequency
28,800 bph
Power Reserve
67 hours
Year
1980

Related Models

seikata-wm-58d4d9a7901d