Seiko Cal. 3828 - 657

Seiko 3828-657

The Seiko 3828-657 represents an important milestone in Seiko's 1971 lineup. Powered by the 3828 caliber with 20j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-623afbf54f5d]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
44mm
Case Thickness
12.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Champagne
Jewels
20j
Frequency
28,800 bph
Power Reserve
67 hours
Year
1971

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