Seiko Cal. 4577 - 991

Seiko 4577-991

This Automatic model from 1990 features a 39mm Hardlex-Coated Steel case. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-e45abed355ca]

Also known as: Monster, Silverwave

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
10.6mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Silver
Jewels
23j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1990

Related Models

seikata-wm-e45abed355ca