I, too, used to have a few 58-note rolls made by QRS.  There was a
matching label, stuck over the maker's details, which said "Bellolian"
organ, Guelph, Canada.  The roll came with a Bellolian organ that I had
15 years ago, so they [QRS] were making rolls for yet another company.

The spool on this one was standard pin-end spool, not square insert
type as mention on MMD today.

Kevin McElhone, England

 [ Kevin wrote about the organ in 050802 MMDigest: "It is a Bellolian,
 [ made by the Bell Organ and Piano Co. in Guelph, Ontario, Canada ..."
 [ -- Robbie