Seiko Cal. 6640 - 816

This Hand-Winding model from 1977 features a 41mm Stainless Steel case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-88f976a26064]

Also known as: Shogun

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1977

Related Models

• Seiko 4564-837
• Seiko 3865-890
• Seiko 4514-239
• Seiko 3856-992
• Seiko 5676-398
• Seiko 0727-491
• Seiko 7130-724
• Seiko 0713-789
• Seiko 4576-787
• Seiko 5258-799
• Seiko 4580-856
• Seiko 4483-824