Seiko Cal. 6630 - 728

Seiko 6630-728

The Seiko 6630-728 represents an important milestone in Seiko's 1976 lineup. Powered by the 6630 caliber with 34j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-d699e816e98a]

Also known as: Baby Tuna

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
44mm
Case Thickness
15.9mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
180m
Dial Color
White
Jewels
34j
Frequency
28,800 bph
Power Reserve
50 hours
Year
1976

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