Seiko Cal. 3815 - 291

This Quartz model from 1971 features a 37mm Titanium case. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-c7c0de3fd68b]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1971

Related Models

• Seiko 6152-283
• Seiko 4577-214
• Seiko 3874-134
• Seiko 6324-596
• Seiko 5646-576
• Seiko 0772-516
• Seiko 0737-300
• Seiko 5629-576
• Seiko 6228-529
• Seiko 6377-438
• Seiko 6328-694
• Seiko 0763-585