Pathe Disk for Home Recording

[Wahski]

Pathe Disk for Home Recording by The Oro-Tone Co. Chicago USA

Anyone have more insight on these round silver things with three holes.
They are 6½"/165mm in diameter and appear to be made of aluminum, and many moons ago were used for home recordings.

I recently got one and would love to hear what could be on this home recording.
Looking at disk has three distinctive tracks on each side.

I tried getting scans but because of reflective surface, didn't turn out great, even if you invert/tweak image for it to display.

I don't have facebook account, but found better images of it via a search

https://www.facebook.com/groups/phonograph/posts/25521449634146139/

Have a number of questions if anyone can oblige:

-These were vertically (not laterally) cut?
Patent says 'invention has particular reference to a record having the laterally cut groove, so called, but is not confined to that type'

Link to PDF of Patent 1421045
-What speed would they play back at -78 or 80RPM?  If so - would not go for long.
-What year(s) were these in use?

-What could you play them on today, sleeve which it comes with refers to 'the Edison'-  So Edison player (Diamond disc) might work which I don't have.
-Guessing a regular windup 78rpm might damage it even if could find fibre/bamboo needle. But might get some indication what is on record
-Would this play at all on my Rega Planar 78 turntable ( RB78 cartridge) ?

-Both sides seem to need a good clean, guessing Isopropyl Alcohol might be ok or with warm soapy water with the aluminum

Edited Saturday at 09:09 AM by Wahski
typos