A few months back I bought a used 78 fretless P-Bass. First time in 20 years with a fretless and having a blast with it. I use TI flats on my Jazz bass and love the sound and feel. The fretless was/is strung with flats, but they are not TIs. Whatever is on there sound similar, and are only just a bit higher in tension. They don't sound real "thuddy", they are clear and expressive, articulate, respond really well to vibrato and buzz nicely off the rosewood fingerboard. So I am wondering what these strings might be? They have black silks at the tuning end that go high up the string. In other words, the silks don't come all the way down to just above the nut, like the Roto RS 66LDs do (or at least used to on a Fender, been years since I used 'em). Interestingly, they have no silk at the ball end; first time I have seen that. Any ideas?