I was looking through my 8140 Dansco Album for any varieties and found several GEM BU 1950-S quarters I had put in the empty holes on the last page. Upon closer examination, they all have either RPM or OMM characteristics. One even looks as if it is an S/S/D (Horizontal).
Here are two of them.
Possible 1950-S/D:


Possible 1950-S/S/D:


Any thoughts or opinions would be greatly appreciated!