Original 1st printing (circa 1961) 3&7/8 x 2&1/4" membership card for the Mouse! Monster Club, the fan club of Detroit's own Stanley Mouse.
  
Art by (and SIGNED in black flair pen (classic early-'60's-style) by the aforementioned Mr. (Stanley) Mouse), thick index card stock membership card is in fantasic uncirculated mint/near mint to near mint (A/A- to A-) condition; a perfectly-preserved artifact from Stanley's pre-psychedelic hot-rod days in Detroit.