Seiko Cal. 6694 - 641

This Automatic model from 1971 features a 36mm Titanium case. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-9eda827705af]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1971

Related Models

• Seiko 3851-767
• Seiko 4558-449
• Seiko 6229-531
• Seiko 6675-612
• Seiko 5226-125
• Seiko 6287-775
• Seiko 6199-748
• Seiko 6330-936
• Seiko 0742-172
• Seiko 5637-266
• Seiko 5230-745
• Seiko 6677-319