Nice find!! Look like they are in really good shape too. I started collecting old 22s about 30 years ago. Started with Remington bolt actions then went to a few Winchester bolts, Marlin levers and kept expanding from there. Getting pretty hard to find really nice examples these days. And, as demand for these old 22s increases even the not so nice ones are getting up there in price, some ridiculously high.
The first 22 rifle that I got to shoot much as a kid was a friends Remington 510 P. I really liked that rifle and with young eyes and the peep sight it shot surprisingly well too. At about 25 yards it would shoot ragged holes all afternoon. Eventually I got my own 22 but still wanted that first 510. I eventually bought it from my friend but later he regretted selling it as it was a gift from his Dad so I sold it back to him and went on the hunt for another one. I found several 510s but not 510 Ps, at least not any in good shape that still had the peep sight intact. Remember, this was before there was an internet, when finding a very specific model of an old rifle, long out of production wasn't nearly as easy as it is today. I eventually found a 510P but during the process also acquired a 341P, 41, 511, 512, 514, 541T and a 581. Although they really aren't that valuable as guns go they are among my most prized possessions. Today, few things take me back to the days of my youth like a walk in the field or woods with one of my old Remington Bolt action 22s.