Seiko Cal. 3818 - 821

Seiko 3818-821

The 3818-821 is a sought-after Solar piece from Seiko's golden era. Powered by the 3818 caliber with 17j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-f97d7e2a891d]

Also known as: Sumo

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
38mm
Case Thickness
8.9mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
200m
Dial Color
White
Jewels
17j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1968

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