Seiko Cal. 3857 - 366

Seiko 3857-366

The Seiko 3857-366 represents an important milestone in Seiko's 1970 lineup. Powered by the 3857 caliber with 21j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-09289f171983]

Also known as: Sumo, Rally

Specifications

Movement
Quartz
Case Material
Two-Tone
Case Width
40mm
Case Thickness
9.4mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
190m
Dial Color
Green
Jewels
21j
Frequency
36,000 bph
Power Reserve
63 hours
Year
1970

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seikata-wm-09289f171983