Seiko Cal. 3857 - 915

Seiko 3857-915

The 3857-915 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3857 caliber with 28j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-34178a7f383b]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
44mm
Case Thickness
10.9mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Navy
Jewels
28j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1987

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seikata-wm-34178a7f383b