I bought this CRT years ago new, in the original TekTroniks box. I doubt if it has more than 10 hours of use on it as I could never get the scope to run reliably. It is like new with no burn marks. I sold the scope and have no further need for the CRT. Part number on CRT: TO540-2 Part # 154-0098-00 I will sell it for $45 plus shipping from 19001. Any interest, please email me direct. Bill Abate