Seiko Cal. 3857 - 444

Seiko 3857-444

The 3857-444 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3857 caliber with 18j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-7d9a78e4d848]

Also known as: Sumo, Bellmatic

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
41mm
Case Thickness
13.5mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Burgundy
Jewels
18j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1971

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