Seiko Cal. 5661 - 840

Seiko 5661-840

This Spring Drive model from 1973 features a 37mm PVD Black case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-1e8ae35c387a]

Also known as: Silverwave, Sea Horse

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
37mm
Case Thickness
8.6mm
Lug Width
22mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
170m
Dial Color
White
Jewels
17j
Frequency
28,800 bph
Power Reserve
59 hours
Year
1973

Related Models

seikata-wm-1e8ae35c387a