Recently I bought a Getzen Super Deluxe Tone Balanced Cornet off ebay. I didn't spend too much on it and it looked like it was in good condition (the bell was not destroyed or looked to have any repair). When I got it in I oiled up the valves and noticed they were pretty dam shiny for something that should be about 50+ years old. A few days later I took them out, wiped them down and took a picture of them. And this is For comparison here are the valves out of my 1991 Yamaha 2320. That instrument was used for its first 6 years, and spent the rest of the time in its case. I know these valves are made of different materials and will wear differently, but I thought it was an interesting comparison.