If you've listen to oldies station on a regular basis, you have heard a Top 300, 400, or 500 of all time on holiday weekends such as the 4th of July or Memorial Day. KRTH in LA had a Firecarcker 300 for about 10 years that was based on listeners votes back in the 80s and 90s.

Back staring in May of 1962 KFXM asked their listeners to vote on their favorite oldies but goodies by send in a list of their favorite 15. They played them during the 4th of July holiday.

Here's a copy of their current survey, and on the back their Maraathon Of Hits. They had of course 59 of them. I don't know if they played more than 59 during their marathon. I guess 300 would have been overdoing it in 1962.

#1 The Mountains's High-Dick & Dee Dee
What is interesting is that Theme From A Summer Place - Percy Faith was #9, and for the next 20 years has been near the top on most of the Top 300 I've seen.
K/MEN did a Sound-A-Thon of the Top 129 of all time towards the end of 1963, but KFXM beat them by a year and a half.
If anyone knows of an earlier "all time hits" survey, let me know.