Seiko Cal. 3820 - 764

The 3820-764 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-6b0d8c789cef]

Also known as: Monster, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1984

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