A sextet of stamps all about silkworms.
Graphic postage stamp commemorating the 50th anniversary of the International Labor Organization.
For comparison, Mall of America's updated identity from 2013:
Studying some solar rays with a bright and bold stamp from Paraguay.
designed by Claudio Alonso
Two from the incredibly prolific Hungarian designer Joseph Vertel. Buildings, thick lines, and grimy halftone dots... this guy knows what I like in a postage stamp design. So good.
Click images for larger view: