Seiko Cal. 3818 - 306

Seiko 3818-306

The Seiko 3818-306 represents an important milestone in Seiko's 1972 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-402815b9268b]

Also known as: Helmet, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
13.5mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
90m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1972

Related Models

seikata-wm-402815b9268b