Hi Sebastian, welcome, as previously stated these are fairly common medals and as yet do not have the value for the fakers, I would agree that they are authentic. The one star that IS faked a great deal is the "Aircrew Europe" star, this being the rarest of all of the Brit stars issued, I would take great care if you see one and wish to purchase. Unfortunately, with rarity comes the con artist, in this respect there's no difference with these and TR, imperial German and Soviet awards, Kaveat Empor, seek advice. Edit, by the way, this is a completely genuine example regards Alex K