i bought a new fretless Yamaha BB614F and like it a lot. It has flatwounds and they seem to be in good shape. The whole bass seems to have been played very little, no dings, no scratches, plastic still on the cavity cover. I think I will let them on until I make up my mind about which strings might come next. All I can say of these strings is that they have a bright green silk wrap at the bridge. Last time i saw a green silk wrap it was a set of Thomastik Infeld on the six string TRB of a friend. I would not throw away a set of TI. Can you identify my strings?