Seiko Cal. 3811 - 975

Seiko 3811-975

The 3811-975 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-7f4b704fa6b9]

Also known as: Monster, Sumo

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
11.2mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
130m
Dial Color
Navy
Jewels
21j
Frequency
28,800 bph
Power Reserve
37 hours
Year
1982

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