The Goons (Decca e.p., 1957)
I just had to post both sides of this fun e.p. cover, possibly my favourite eBay purchase ever (and as a bonus, it actually came with a record). The art is by Rex Morston, but obviously inspired by Spike Milligan's famous doodles, and nicely decontstructs the nature of album covers by playing with the placement of the catalogue number, printing the song titles upside down, and providing useless information about how not to damage the record (a frequent addition to album covers in the '50s and early '60s) on the back.
The record's fun too. No Yuletide would be complete without I'm Walking Backwards For Christmas.
for the series: Stacks o' Wax