Insert Generic Record Size Entendre Here

I recently obtained a small stack of Columbia Record's contribution to the record format wars, the 10" album. Just casually leafing through them I have been fascinated by the programming choices for a format that's longer than a 78 rpm single and a 45 rpm single, but not as long as the upcoming 12" 33 rpm album. This one, in particular, seems to be a little short, with a running time of just over 20 minutes - hardly a full side on a 12" 33.

This one has some weird/great cover art, though.

Austrian Symphony Orchestra - Favorite Overtures - Remington Records RLP-149-48

Beethoven - Coriolan" and "Egmont"
Mendelssohn - "Ruy Blas"