Seiko Cal. 3873 - 840

Seiko 3873-840

The 3873-840 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3873 caliber with 22j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-ac9a0f762d1f]

Also known as: Monster

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
34mm
Case Thickness
13.9mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
150m
Dial Color
White
Jewels
22j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1970

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