[78-L] Edison Amberol Concert Series Black Case

[Clifford Bolling]

 Just brought home a huge library of cylinders and found this one among them, it is all black with EDISON 
in gold script as the only printing.  The top label looks like the Edison Amberol tops except it is black with 
gold printing and the bottom has the 'conditions' printed in black on a round white sticker.  
Since this collection contained about 900 cylinders and this was the only case like this, may I assume 
these are not so common?
You can see the case here:
http://78labels.cdbpdx.com/CYLINDERS/28014/
Unfortunately, the cylinder for this was not present, #28014.
Thanks!  Cliff