Led Zeppelin Untitled album very odd matrix!!

[Lionals vinyl]

I am a discogs seller. I have an "Untitled" orange letter album. the matrix is odd and i cannot find an examplke anywhere. labels "made in uk" matrix side one : K40031A  588171 A//1 13(?)    Matirx side two: K 40031B 588171 B (inverted triangle) 4 11

THEN ETCHED IT SAYS: R.I 1973 What ever turns you off!!!@ (followed by either a cowboy hat or flying saucer mark)

labels are correct. cover fully laminated. inner sleeve MADE IN ENGLAND. PATENT NO. 1.1225.555.

if no one has come across this i will have to add it to the database as a unique variation

thank you

Frank