For those who dare… Series 2000. (More on Series 2000 as additional research comes in. Right now what we know is limited to 1) it started in 1959, and ended in 1966.) Side note, check out that Murder, Inc. cover! It just made my want list. The Groove’s most wanted!
The Prudent Groove 
Funny…..I was just listening to one of these.”Great movie themes”…..Sounds great, pressing, not so much.
These covers are amazing! Almost worth the hunt for those alone!
I’m a fan of “Mood music” albums on budget labels….I own quite a few. Lot’s of “Cheesecake” photos on the covers.
Thanks for sharing. I have the Flutes and Percussion album but it didn’t come with an inner sleeve so I wasn’t aware it was part of a series. I’ll have to keep an eye out for these.
Same here! I love finding little insert gems. 1) they’re typically a throwaway these days, and 2) they’re a window into a new pocket of music history to explore.