Seeking Info on a Savage 410/22 I got when I was 8 yrs old

Pre 1968, serial numbers were not a requirement. I have an S-D .22/20ga and it had no serial number. You might want to check the FAQ page (strangely, I cannot get to it from the forum) from the main page. If the P means anything, it would be a 1963 build. You didn't say what year you were 8 years old, so check if that jives with the timeline. It's probably a field grade side lever model. There isn't much to know other than it was a do all small game combo gun. Savage currently make the model 42 combo and Chiappa makes combos (Double Badgers) as well. I have a Chiappa DB in .22/20ga and I prefer the Savage, although I modified it with choke tubes, fiber ghost site (ala Chiappa) and refinished the stock. I had a Savage 22/410 albeit newer than yours. I was a great bunny/squirrel gun. It was stolen, which still makes me sad.