The Yemen, first came to my attention in the early 80's when catering the Yemenia 727. This was the first time I came across guns, carried by their skymarshalls. This stamp was used in May 1972, a defining moment in the history of this troubled country and the outbreak of civil war.
I decided to buy a Yemen stamp after Sue and I had a coffee in a Yemini cafe in Rottingdean. I ended up in a bidding war for a pack of stamps. Quite a few of them feature an aircraft that is crying out for an investigation. They also do very nice gold stamps. More on both these things later.