Seiko Cal. 6671 - 645

This Hand-Winding model from 1975 features a 36mm Titanium case. With its 21mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-32bb5035a452]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1975

Related Models

• Seiko 5252-534
• Seiko 6692-591
• Seiko 4515-759
• Seiko 5692-773
• Seiko 5210-931
• Seiko 4437-792
• Seiko 4442-937
• Seiko 5643-238
• Seiko 6673-466
• Seiko 4542-785
• Seiko 6266-729
• Seiko 6390-786