[78-L] 78 rpm album sets

[samhopper at mail.com]

Hi people, 
I'm trying to find any information on the following 78 rpm classical Columbia Masterworks albums: 

Set M 62 
Set M 220 
Set M 141 
Set M 145 
Set M 476 
Set M 594 

Set X 37 
Set X 41 
Set X 49 
Set X 50 

I'm hoping someone out there has these elusive sets or knows something about them - even sketchy info is gratefully received. 
I'm looking for composition, composer, record numbers, matrices etc... in fact anything. I'm using this group to widen my search - I've come to a stand still...