The Arosa Line operated between 1952-1958 running between Europe & Canada & the US mostly students on holiday in both directions. The pen is A Liberty Product & features one of their liners that moves back & forth in liquid. The pencil is in excellent condition & works. Vintage Circa 1955 Advertising Mechanical Pencil Arosa Cruise Lines Oil Filled End. Freund Im Canada-Dienst, A Liberty Product