Seiko Cal. 3820 - 641

Seiko 3820-641

The 3820-641 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-3f2925a351ad]

Also known as: Shogun, Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
42mm
Case Thickness
12.3mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
80m
Dial Color
Burgundy
Jewels
18j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1965

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