So, guys I've been thinking on this, which one of Khaba's fingers were used to put on the Ring, and later get cutted by Asmira, taken by Barty to the mediterranean sea, and simply thrown away there? Is it actually mentioned in the book and I get a bad translated novel so I don't know it even if I've been re-reading it for three times?

little finger of his left hand, I believe?
why do you ask?

'cause I don't know and I wanna know it.

*is amused* you seriously want to know which finger khaba got chopped off?