cryptic messages in old vinyl numbering systems

[Jeanne Berrong]

Good morning all,

Just when this thread is dying out, I'd like to throw out another vinyl
query:  what's up with the funky sayings inscribed in the smooth part of
the vinyl at the end of an album side?

(as I typed this question, my better half looked over my shoulder, mumbled
a quasi-answer, then went and grabbed a copy of an album from one of his
old bands.   There, etched in the vinyl are the words, "Smell this.")

Just wondering . . .

Jeanne