[old_tv_nut]

Life of CRTs can vary widely with quality of manufacturing and how hard the chassis drives it, how bright the users set it, etc. A TV set from the big two (RCA, Zenith) was expected to have an average life of 10 years with 5.5 hours use per day, or 2000 hours per year. So, depending on all the factors, that might be the original CRT still strong at 20,000 hours or original plus one replacement in ten years. Crappier brands like Admiral or off years for Zenith could be worse.

So, I would say 34,000 with still a good picture is doing well, and if it's not showing it's age at that point, it probably has quite a few more years left.