Postage Stamps
3-D Op art stamp commemorates Op Art, perhaps one of the first and only 3-D stamps ever made, not sure of that though.
Op Art (Lenticular Issue)
Ink-jet and envelope
4.24 x 8.25
2010
3-D Op art stamp commemorates Op Art, perhaps one of the first and only 3-D stamps ever made, not sure of that though.