Mercury (toy manufacturer) Marklin, the company was started in 1932, by Attilio Clemente and Antonio Cravero, but its first toy was a gun produced about 1939 (Batazzi et al 1974; Force 1992, 5; History of Mercury 2013; Ralston 2009, 62). The company first began making toy cars just after World War II, so is one of the earliest diecast model makers preceding Corgi and many others and it was the earliest producer in Italy (Richardson 1999, 134). In Italy there was little competition for Mercury through most of the 1950s (Force 1992, 5). Early cars were more Tootsietoy-like with simple cast bodies, wheels
Spekkens toy model entanglement also has a strong analogue within the toy model, as a group of three or more systems in which knowledge of one system would grant knowledge of the others would break the knowledge balance principle. An analogy of quantum teleportation also exists in the model, as well as a number of important quantum phenomena. Work has been done on several models of physical systems with similar characteristics, which are described in detail in the main publication on this model. There are ongoing attempts to extend this model in various ways, such as van Enk's model and the "Pacman version".