The Wienermobile

the oscar mayer wienermobile was at our local post office this morning. laura & i couldn't resist taking our pictures with it. when i told the driver "it's not every day you see a wienermobile!' she replied, "it is for me." and then she gave us each a wiener whistle. so when did the first wienermobile go on the road? was it:
a) 1936
b) 1954
c) 1968
if you know the right answer, you'll get double punches today!