[Meaning] discovery, invention.
"[It is] obvious that even to someone with a lot of education who strives to know a lot of things, this is also a find."[1] That is, an invention, a regimen.
Also [sc. attested is the plural] 'finds' [to be understood] likewise: discoveries, inventions.
Xenophon [writes]: "when I saw that you had fallen into many intractable circumstances, I considered that it would be a find if I were able to ask of the king that he grant me the ability to take you back safely to Greece."[2]
"He considered as a find even the Magi, who inhabit Babylon and Sousa."[3]