Business Card-Kanter's Magic Shop-Philadelphia-ca.1930s.
One side has an optical illusion with red image.

From Magicpedia, courtesy of Genii Magazine: Mike Kanter (1897-1979) was the founder of Kanter's Magic Shop in 1932 in Philadelphia and his Kanter's Komments column in Genii ran from 1937 to 1942.

DATE: Circa 1930s/40s
SIZE: 2 1/2 by 3 7/8 inches.
COND: In otherwise Very Fine, almost Mint Condition.