The modest modern design of the tank solo watch made it a classic from the moment it first appeared in the tank collection the tank solo honours the unique aesthetic that lies behind the collections success while reworking the model with a number of variations adding gold steel a pink dial and a panther or python motif these highly accessible variations were rapturously receivedcase in 18k pink gold and steel 18k pink gold beaded crown set with a synthetic spinel cabochon sapphire cry