Seiko Cal. 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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