Seiko Cal. 5660 - 331

Seiko 5660-331

This Solar model from 1988 features a 40mm Hardlex-Coated Steel case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-32e31e88b673]

Also known as: Sumo

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
13.5mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
150m
Dial Color
Silver
Jewels
27j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1988

Related Models

seikata-wm-32e31e88b673