I think it was common back then on the cheaper 22s. I had a Stevens single shot 22 that was over 50 years old. I gave it to my son because it came from my uncle, to my dad and then to me. I remember shooting it as a teenager.
I'm not joking, the stock looked like it was made out of 1X6. Totally flat on both sides and about 3/4" thick. Looked strange.