I found this stamp in a mix of Cinderellas. I wonder though if it's an airmail stamp? It says Kingdom of Serbs, Coats and Slovenes and "Zracna Posta" - "Airmail". Also, it is denominated 2 dinars, which would argue against a cinderella. But I don't see it in Scotts anywhere (or am I just looking in the wrong place as my wife is always pointing out?)
