Seiko Cal. 6691 - 320

This Hand-Winding model from 1967 features a 42mm Hardlex-Coated Steel case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-8f7433d7ba88]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1967

Related Models

• Seiko 6253-204
• Seiko 7140-491
• Seiko 4594-179
• Seiko 5688-494
• Seiko 5283-336
• Seiko 7014-684
• Seiko 6198-912
• Seiko 6271-554
• Seiko 6638-258
• Seiko 4570-604
• Seiko 7061-972
• Seiko 0743-530