Wow, a '68, that would have been nice. They are nice strings for that vintage vibe and a little pricey but worth it if that's what you're looking for. Be well. :)
I'm enjoying my Pyramid Gold strings. I have them on my Alembic Brown Bass. Had my dealer put them on from new. They take a minute to wear in as I'm sure you've learned.
HI Rogelio, it's this set here: www.daddario.com/products/guitar/bass-guitar/xl-chromes-bass/ecb81m-chromes-bass-light-45-100-medium-scale/ These fit the Hofner properly, short scale set ends up with the silk on the nut. I hope this helps, be well and best wishes for 2022.