I have always liked this set, but did go a little overboard in collecting it. When I first finished the 72 card set it annoyed me that some backs ( 2/3) were gray and some white. So I decided to finish it out in both gray and white back. This took some time as the whites are harder to find than the grays, and some whites seemed harder than others...even though the set was produced on two 36 card sheets
While looking for white backs I also finished the set in "proof" form (undeckled cards cut from sheets). Unfortunately my proof set has both white and gray backs ( sigh...a problem for a future day)
I also picked up a full set on uncut sheets
The set may not be that popular with collectors because it is B&W and oversized, but I have always admired it
