Seiko Cal. 3813 - 221

Seiko 3813-221

This Spring Drive model from 1999 features a 45mm Two-Tone case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-474f2071082d]

Also known as: Monster, Bellmatic

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
45mm
Case Thickness
8.2mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Burgundy
Jewels
21j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1999

Related Models

seikata-wm-474f2071082d