Hey Rob, if you happen to have one extra old hat knob left after Trevor lets you know if he needs them I would love to have one. Alembic no longer gets the exact same hat knobs they used in the 70s and when I had the master volume added to my 78 Series I bass a few years ago they had to use the newer knob for it. As nit-picky as it sounds the new knob looks just different enough that it has always bugged me visually. I am surprised, though, that you aren't going to keep all the original knobs in case you ever sell any of the basses. Thanks!
Time to watch Trevor's video about this unique old bass...