Home-Recorded Acetate Disc Rips 1-4

Here's two old acetate transcription discs which I picked up at a thrift store. The sides are labeled 1 to 4. They contain home recordings of somebody playing the piano. No idea what time period they're from, but if I was a guessing man I'd say the 1950s (especially since the actual sleeves they came in have an advertisement for reel to reel tape on them).