Jljr1944,
Well, if you are only going to have two rope knives, then you picked two real beauties!
I see more Miller Bro`s rope knives than any other single patten they made, and they made just about everything. They made two sizes as shown here, the large model 4 7/8" closed and the rarer smaller one which is 4 1/4". Miller also made a gravity knife for the U.S. government on contract during the Spanish American War era. I am sure they also sold the Navy folders as well. The gravity knives were deeply acid etched "U.S. NAVY", these also came in two sizes.
The handles were jigged bone, some were ebony wood. Occasionally you will see the gravity knives turn up for sale, but not very often. I have seen the folding rope knives with the blade acid etched "U.S. NAVY".