I usually take off strings fitted to basses i've sold in the past, putting new strings on ..though not every time
But those i take off , if in good nick, get coiled up and chucked in my accessories draw, but i never seem to remember to keep the packaging when i buy strings
so any strings removed become ' unkown make ' after a few months.
Just out of curiosity , i fished out some decent strings today but i'm wondering what they are. Hoping the colours are a clue. There's no silk wraps at the tuner end