Play on Words - Spanish
With 'por que' being 'why' and with por being the same as the 'X' used in multiplying and 'Q' as an abbreviations for 'que' this picture reads Why? or Porque (XQ) with the floor being the X and the mug being the Q.
postmarked in 2009 with a Mexico $10.50 'wooden bowl' stamp
very clever postcard!!