This is an interesting pair of stamps that are classified as tete beche AND se-tenent at the same time. It is also in keeping with my current ships on triangles series of posts that are meant to be entertaining and informational. Can you tell I'm an educator?

These are Monaco J40 and J49, postage due stamps issued in 1953-54. J40 is a sailing ship and J49 the S.S. United States.
Tete beche - a pair of stamps in which one is upside down compared to the other
Se-tenent - an unsevered pair of stamps that differ in design, denomination or overprint