[ Julian Dyer wrote in 190316 MMDigest:

> The Schnabel roll on ArtEcho is identified in Albert Petrak's
> RPRF list as being taken from the Hupfeld (Triphonola) roll: 
>   Triphonola 50478 = WEBER - Invitation to the Dance, Op. 65 
>   (Also: ART-ECHO 2033) 

Julian Dyer suggests the unknown Artecho roll is a derivative from 
a Triphonola roll.  It is true that Schnabel recorded "Invitation to 
the Dance" for Hupfeld (also for Philipps Duca), but Melville Clark 
(who marketed the Artecho) had an arrangement with Welte, not Hupfeld,
as explained by David Bowers in his Encyclopaedia.

Peter Phillips
Padstow, NSW, Australia
https://www.petersmidi.com/