Another DYR Scoop! Cadbury's Laughs

We hopped aboard the DYR Time machine once again & jumped back to 1973 to bring you this forgotten gem from Cadburys. Time seems to have confined this one to History's litterbin, as I could find no mention of this bar anywhere on the Net. So here it is in all its Chocolatey glory..
It appears to be the standard generic 3p Milk Chocolate bar (see Monster Bar,Dr Who,etc) in a sleeve featuring a different 'prank' to play on the reverse. Anyone have any memories of this bar? Let us know. Click here for full 1973 advert