Seiko Cal. 3820 - 742

Seiko 3820-742

The 3820-742 is a sought-after Solar piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-f38f1346d4fa]

Also known as: Monster, Helmet

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
45mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Black
Jewels
22j
Frequency
21,600 bph
Power Reserve
45 hours
Year
1968

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