A vintage pressurized metal Slazenger tennis ball tin featuring 'Nylon Armoured' branding and U.S.L.T.A. approval, likely dating to the 1960s or early 1970s. This unopened 'factory fresh' can is a rare find as it retains its original key-wind opening mechanism and attached key, showcasing classic mid-century sports graphics.  Can contains 3 tennis balls.