Seiko Cal. 3815 - 504

Seiko 3815-504

This Spring Drive model from 1971 features a 41mm Titanium case. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-956a5ecd13a1]

Also known as: Monster, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
41mm
Case Thickness
11.1mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
50m
Dial Color
Black
Jewels
19j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1971

Related Models

seikata-wm-956a5ecd13a1