These strings were on my 3/4 Calin Wultur which I bought in September. They sound and feel great. Since I bought the bass used I can't say exactly how old they are, but they're in very good condition, no wear, fraying or discoloration. I'm guessing less than a year of occasional use. I'd be happy to email pics on request. I'd like $85 for the set, shipped to the ConUS.