An interesting collection can be made comprising robots on postcards. This first example is from the heyday of ‘saucy postcards’ sold to holidaymakers at the seaside.
Drawn by Frank Eric Smith, 1908-1985, who produced many seaside postcards in the late 40s and early 50s. On the back it states that it was passed by the British Board of Postcard Censors, and distributed by Coastal Cards Ltd, Clacton-on-Sea.
Perhaps the most famous comic postcard artist was Donald McGill. According to Wikipedia, McGill, who died in 1962, produced an estimated 12,000 designs, of which 200 million copies are estimated to have been printed. One of his postcards, “Do you like Kipling?” “I don’t know, you naughty boy, I’ve never kippled!” holds a world record for selling the most copies at over six million.