Seiko Cal. 3820 - 766

Seiko 3820-766

The 3820-766 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3820 caliber with 31j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-ee59342bcd09]

Also known as: Baby Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
41mm
Case Thickness
8.9mm
Lug Width
19mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
130m
Dial Color
Cream
Jewels
31j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1974

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seikata-wm-ee59342bcd09