Seiko Cal. 6671 - 661

This Hand-Winding model from 1977 features a 42mm Stainless Steel case. Powered by the 6671 caliber with 25j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-958934a7a2cf]

Also known as: Tuna, Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1977

Related Models

• Seiko 4597-241
• Seiko 5244-785
• Seiko 6260-458
• Seiko 6613-142
• Seiko 7030-477
• Seiko 3875-155
• Seiko 6159-510
• Seiko 6255-733
• Seiko 6396-471
• Seiko 3860-433
• Seiko 4512-287
• Seiko 5225-544