Not sure of the chassis number. I like the cabinet style on this set tho! I do believe the seller is mistaken (or I could be) but I believe this is a 23" set. 25XP22 is a 23" tube. I don't think RCA ever made a 25" tube set, they were all 23".
http://cgi.ebay.com/ws/eBayISAPI.dll...291832047&rd=1