I recently visited the WFW shop in Vienna, Austria, and purchased a lovely vintage button-filler fountain pen. The shop owner said that though the pen was unmarked, he believes it is most likely a vintage made-in-Austria Tempo. The body is celluoid, the section of hard rubber. On the nib, the words say "WARRANTED 14 Ct 1st QUALITY". I am a little unsure if I heard him saying it was made in the 1960s, because on the certificate he provided me, it said "1930s". I was wondering if anyone could provide any information to help in identifying the make or placing the time period of this pen? TIA!