1938, "Macy's College Shop" [display advertisement], New York Times, 14 Aug, p. 19:
For conversation pieces . . . the whacky necklace called "Don't take any wooden nickels!" at $1.83 (designed by Martha Sleeper).
1951, "Folklore in the News: Cliché Strip," Western Folklore, vol. 10, no. 1 (Jan), p. 84:
H. T. Webster's comic strip, "The Timid Soul," in the Oakland Tribune of September 10, 1950 used the tendency to repeat worn phrases as the subject for the hero's good intentions. The following are recorded: . . . Don't take any wooden nickels.