I just recently reacquired some old LP's that I thought were lost, and yet my mom found them! The most important is a 1966 LP from Leo the Lion/MGM Records, "The Official Adventures of Batman and Robin", produced at the height of the late 1960's Batmania craze. Truly, these are rare treasures!
The audio content are radio-style plays that predate the Power Records releases. I haven't seen anyone put these files up online, so I decided to make a fan video of the first quarter of the record: "The Legend of the Batman", incorporating visual elements from Golden Age sources by Bob Kane, Jerry Robinson, Dick Sprang, Sheldon Moldoff, etc. I h