First off, to TONMO Solius! Or at least to becoming a non lurker
The top one has the expanded siphuncle segments of an actinocerid, but the siphuncle is smaller than I'd expect to see in an actinocerid. More study needed for that one. Without a view of the siphuncle the other two will have to remain orthoconic nautiloids unless we can find some papers on the nautiloids from the formation you found them in.
I have a few actinocerids and the siphuncles, of them, are about 1/4 to 1/3 the width of the phragmocone. They are stored in a warehouse, and I don't have photos on the hard drive, but the next time that I am out there, I will try to find them.
Here is a nautiloid that I recovered from a rather strange bed early Late Ord rx from Central Ky. The bed is composed of, almost entirely, nautiloids and asaphid trilobites remains-- molts and some whole ones(one of the juvenile trilobites appears to have had a bite taken out of it).
The photo on the right(magnified and better lighting) appears to have part of the external shell structure preserved???
I have found some bivalves in the same bed with parts of the original shell material preserved... color and all!