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)

That's consistent, in that Hupfeld licensed several companies to use
its material, a far less common thing for Welte.

Julian Dyer
Wokingham, Berkshire, UK