Yes, my brain fart. I was thinking about the router bit. A half round profile is commonly called bull nose.Well what ever its it aint no bullnose,bullnose planes have the iron right up front so you can work right into a corner.
This could be newer than you expected. These planes were made in the 1900's. Not practical to date. My planes may be like yours, no marking to identify the maker, hence no way to attempt a date.How old do you guys figure this is? Late 1800's?