No.1995
The intro to each episode had a girl on a broomstick with a pink background and some text, possibly the studio logo or the name of the anime
No.2028
A girl on a broomstick?
Eh… all I can think of is YuYu Hakusho.
No.2047
I think I may know which one you're talking about (if it's from the late 70s to mid 80s), sadly I can't remember…
I recommend you watching on youtube a video about "Magical Girl Openings of the 80s" (or 70s) if not on the long vid, try the recommendations. I recommend this option because I got into the hardcore classical maho shoujo from that video and others recommended
If that fails, look at pic related
post your results.