Seiko Cal. 3857 - 537

Seiko 3857-537

This Automatic model from 1978 features a 46mm Two-Tone case. Powered by the 3857 caliber with 17j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-d49214707ff5]

Also known as: Monster, Sumo

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
46mm
Case Thickness
15.8mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Navy
Jewels
17j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1978

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