Seiko Cal. 6661 - 680

Seiko 6661-680

The Seiko 6661-680 represents an important milestone in Seiko's 1983 lineup. Powered by the 6661 caliber with 36j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-35949a92bebc]

Also known as: Bullhead, Bellmatic

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
45mm
Case Thickness
11.6mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
Black
Jewels
36j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1983

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