The Stroboscope

Although the stroboscope was invented way back in 1832, quite possibly the first application of the stroboscope as a tuning device for pianos didn't happen until 1915. We read a short article in The Tuners' Magazine from July of 1915 describing the patent of such a device. I quote the article in part:
"The operation of the Gordon device (invented by Philip Gordon, a piano tuner from Barre, Vermont - ed.) is based on the principle of relative or absolute synchronism between a device rotating at a known speed and a (piano) wire vibrating at the same speed or a multiple thereof. A small disc is rotated at any one of a number of known speeds depending on the note desired, and the sound vibrations are received by a microphone, which is the same as that used on all telephones to receive the spoken words, which converts the sound vibrations into electrical vibrations. This microphone is connected in a circuit with a magnetic device which converts the electrical vibrations in the circuit to mechanical vibrations indicated by pendulum-like swing of a ray of light. This light strikes on a small ground glass finder very much resembling that used in a camera.

"An indicator is used to regulate the rate of revolution of the disk, and by merely turning the indicator point to the position designated for the desired note and then starting the revolution of the disk, the operator has merely to tighten or loosen his string and watch the action of the light. Without resetting his machine he can absolutely tune each string of the same note."

I'd like to have seen such a device to see if it was like the StroboConn, invented in 1936.