In the german air magazin "Fliegerrevue" i found an interessting article by Tom Cooper who wrote that the widly known story that the Nesher was made in Israel by IAI was a fake. Cooper wrote that the Nesher was built by Dassault in France and was secretly shipped with US transport planes to Israel. American technicians reassembled the planes in Israel and then handed it over to the Heyl Ha'Avir (IAF). He also wrote, that the prove that the Nesher was made in France is the fact, that the planes have french fabrication numbers and signs (Typenschild is the german term).   Fliegerrevue 7/2009 page 64   If this would be right, the often told story that the Mossad had stolen the Mirage 5 blueprints from Switzerland would be also a fake.