Seiko Cal. 6638 - 825

Seiko 6638-825

This Kinetic model from 1978 features a 40mm PVD Black case. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-80cdc4d2d310]

Also known as: Samurai, Tuna

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
40mm
Case Thickness
13.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Burgundy
Jewels
27j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1978

Related Models

seikata-wm-80cdc4d2d310