Harold has got some old 78s from a doctor's wife which at the time were becoming rarer. He has purchased a job lot of old records and looks forward to listening some classical music in the evening.
Albert dislikes classical music and is more into populist stuff like ragtime. So he seems pleased that not all the records are classical but some stuff from the 1930s.
When Harold listens to the music, Albert goes out of his way to make as much noise as possible. It leads them to have a row and Albert throws the keys in the yard.
The keys contained everything including the safe. Now both have to find it but the yard is full of junk.
The story had a great opening as Harold contemplates whether to suffocate his old man. Thinking no one will find out.
The rest of the story was more childish, although I acknowledge that was the point of the plot. It was a weaker story and it shows when Albert threatens to throw the keys down the drain. He would have had to throw down all the keys.