I always want to know exactly what is depicted on a stamp, especially if it is a building, vehicle, or other interesting object. I always try to find out exactly what is depicted on a stamp design when the design does not explicitly state so. This thread is for the identification of things on stamps. I would love if anybody else who has been curious about what exactly something depicted on a stamp really is would post.
First: These Greek airmails feature very unusal aircraft. I assume they are different planes on each stamp. The sets both stamps are from feature the same 2 aircraft with relatively consistant design. Can anybody identify these planes for me?

