At the beginning of 1926, QRS took over the production of Artrio
Angelus rolls.  Also at that time they started to issue rolls for
the new Recordo C system.

Already in mid-1925, as the acquisition of Artrio Angelus rolls was
in the works, P.K. Van Yorx (head of the Wilcox & White recording
studio) was already coding rolls for the Recordo model C and recoding
select Artrio Angelus rolls to the C system. When issued in the
Recordo C format, the recoded Artrio Angelus rolls had an A prefix.

My question for those knowledgeable of the C system: Were the Artrio
Angelus rolls also issued in the Recordo B format?

Thanks,
Dave Krall
Hammond, Indiana