Few years before that chronal node, with a gleam in his eyes and a rosy glow to his cheeks young Kjartan Arnorsson adopted the Great and Terrible Name of Karno, and decided to properly celebrate it by printing Karno's Klassics - 'coz, y'know, wmisspelling words win wfavour wof walliteration wis kool.
A bit of entropic decay later, in month of the year stated at the beginning of this nonsensical tirade, KK series grew mature enough to have it's own Special Editions. One of which is this pile of art.
Now, given Karno's attitude towards printing stuff, it is highly possible that you already saw most if not all of it in other anthologies and folios - but the image search returned null result for me, so here you are. And, yes - 'PB' stands for 'Porno Babies': a chibified version of Karno's usual style - for a certain definitions of 'chibified' and 'usual'.