[ Ross Schacher wrote in 230422 MMDigest:

> Can anyone tell me what I have here? What would play them?
> https://www.mmdigest.com/Attachments/23/04/21/230421_095627_IMG_20230421_0001.jpg 

Hi, Ross, These are discs for a No. 6/6N Symphonion music box.
They are center-driven using the square hole adjacent to the
center spindle hole. The discs are numbered in the 2000 series.

Musically yours,
Bill Wineburgh
Succasunna, NJ 07876
http://antiquemusicbox.us/