During the summer of 2015 four pieces of clarinet Leblanc LL came in for revision at MRO Saxophones. An excellent opportunity to compare these four clarinets and have a good look at the differences among them.

MRO saxophones recently started on the overhaul of an alto saxophone Buescher Aristocrat "Big B'. Because we also have an almost identical spare body of a the same type of horn I did some research on any differences. 

This original warranty card from 1927 was hidden in the case of an alto saxophone Conn New Wonder II (ChuBerry). These warranty cards are rare and most have disappeared over time. It is in very good condition and contains valuable information on instrument maintenance in the nine pages of the booklet; a must for every Conn enthusiast. I have scanned all pages: see attachment.