[78-L] Spiked Edge Victor Test Pressing

[Clifford Bolling]

I have a 1932 Victor test pressing featuring MELODY by the Leo Reisman Orchestra.  The edge has 'spikes'.  
 
It looks like it was done while the 'wax' was still soft enought to easily cut away.  
 
What was the reason for this?  A couple of the spikes still have traces of the recording session info scratched
into them.  You can see this disc on YouTube at:
 
http://www.youtube.com/watch?v=DMVXT7OVlng
 
Weird.
 
CDB