The only find worth mentioning (and it's a personal mention) is this Tex Ritter 45. From what I've been told, it was one of my grandfather's favorite songs. He passed away a few months before I was born so apart from pictures and a scant minute or so of silent Super-8 film footage, its things like this that gives me something tangible to relate to him by.
Recorded in 1961. (With the death of Andy Griffith this past year...the star dusted Big Tally Book no longer has any living names left.)