Seiko Cal. 3820 - 905

Seiko 3820-905

The 3820-905 is a sought-after Automatic piece from Seiko's golden era. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-a781a8745eb0]

Also known as: Pogue, Helmet

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
36mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
180m
Dial Color
White
Jewels
23j
Frequency
28,800 bph
Power Reserve
47 hours
Year
1974

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