Seiko Cal. 6639 - 540

Seiko 6639-540

The 6639-540 is a sought-after Kinetic piece from Seiko's golden era. It features a Black dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-150ad8848bd1]

Also known as: Sea Horse

Specifications

Movement
Kinetic
Case Material
Gold-Plated
Case Width
37mm
Case Thickness
11.6mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Black
Jewels
36j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1979

Related Models

seikata-wm-150ad8848bd1