I don't think the "Variations" was recorded in any form during the
piano roll era; Ives did not publish the piece during his lifetime.
I'd be flabbergasted if any piece by Ives was recorded on a piano
roll.  During that era he was not a well-known composer at all.

Eric Stott

 [ At http://www.loudounsymphony.org/notes/ives-america :
 [ "First version of 1891-92 composed for organ.  In 1902 he
 [ added more variations, ... drawing on the pungent sonorities
 [ created by the simultaneous juxtaposition of different keys."
 [
 [ At http://www.musicweb.uk.net/Ives/WK_Organ.htm :
 [ "[Organist] E. Power Biggs premiered the work in 1960.
 [ He was also the first to record it."
 [
 [ -- Robbie