“Practice is the best of all instructors.”

Ahh, very wise words indeed, but there’s more on the back:

“01 05 12 17 28 – 11
02 35 27 35 38. 1 6 8”

I’m currently working on a decoder for this cryptic message because I haven’t been able to find one on eBay. My first crack at decoding it resulted in the phrase, “I have your nose.” I think I need to double-check my notes.