This issue is a variant of The Avengers (Marvel, 1963 series) #239 [Direct Edition]. There exist further variants.
Humorous filler with letter on The Avengers #234; Question of the Month "What is your shoe size?" asked to Stern, Milgrom, Sinnott, Novak, Scheele, Carlin, Gruenwald and Shooter. Letter from Tom Brooke