Perhaps it was this?! 😀
http://cgi.ebay.com/RAF-CHAMBER-POT-WITH-EMBLEM-LETTER-OF-PROVENANCE_W0QQitemZ6601996486QQcategoryZ106154QQrdZ1QQcmdZViewItem
Apparently belonged to Stanford-Tuck, no less, so you never know!
Skipper

Probably worth a few bob seeing as it was owned by Batman.. LMFAO!! 😀