Bhutan Space 1968 Astronomy NASA 3D Stamp Insert Actifed Decongestant Letter

Rare, unique use of a plastic 3-D stamp on Actifed advertising 8 1/2 X 11 letter showing a space-walking astronaut and a firing lunar module--something that would never happen in real life! This 3-D lenticular stamp was released by Bhutan on October 30, 1967 and is touted in the text as a world's first. The red message at the top appears to be rubber stamped, reporting that two of the three Apollo 7 crew took Actifed tablets on their space flight, actually on the fourth day into their 11 day mission. Maybe command module pilot Donn Eisele just had no need for them?

Excellent condition.  See photos of the actual letter and stamp.