The proudly displayed insignia of the Tesla Coil Builders Association on the front of the Model 13M 3,600 R.P.M. 10 H.P. synchronous rotary spark gap.
The proudly displayed insignia of the Tesla Coil Builders Association on the front of the Model 13M 3,600 R.P.M. 10 H.P. synchronous rotary spark gap.
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