It was my understanding that no quad records were ever released of Decca (London) Phase 4 material (only on Q8 and Q4). so is this e-bay seller mistaken.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=306&item=4025285170&rd=1
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=306&item=4025285170&rd=1