Seiko Cal. 3820 - 720

Seiko 3820-720

The 3820-720 is a sought-after Quartz piece from Seiko's golden era. Powered by the 3820 caliber with 24j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-9805572cc61a]

Also known as: Bellmatic, Arnie

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
Silver
Jewels
24j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1971

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seikata-wm-9805572cc61a