Citizen launched the first Tsuno Chrono timepiece in 1973. This year, in celebration of five decades of the space-age material Super Titanium, Citizen introduces the updated Limited Edition 1973 Tsuno Chrono Racer Super Titanium, built to be 40 percent lighter and five times more durable than stainless steel. #MyCitizen #CitizenWatch #CitizenTsuno #SuperTitanium50 #chronograph #EcoDrive #EveryCitizen #adventuretime . . . . Model #: AV0081-51X MSRP: $1,150