In 1955, Universal Genève equipped the Polerouter with their new 215 micro-rotor movement, one of the first of its kind (the other being Hamilton/Buren’s “planetary” rotor found in their Thin-O-Matic range). Though the revolutionary 215 was first introduced in 1955, Universal Genève was not able to patent the movement until 1958 due to a legal dispute with Buren. As a result, early 215s were signed “Patented Rights Pending” underneath the rotor.