Seiko Cal. 3880 - 920

Seiko 3880-920

The 3880-920 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3880 caliber with 23j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-4f44b3b638ba]

Also known as: Bullhead, Helmet

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
40mm
Case Thickness
15.6mm
Lug Width
19mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
110m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1970

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