The value of pipe #520 is 28 points.
Sol Tane (norush77) had an auction for this very good specimen on eBay. I was pleased to win the auction and add it to the collection. I no longer have this pipe; it was sent by mistake to Charles Brockhouse who thought he was buying #503 and, after a short discussion, he decided to keep it instead of swapping for the pipe he intended. I do meet the nicest people online!