Here is an accurate 1:12 model of the bike used by Hilts to escape the Germans and the Stalag Luft. Actually a Triumph TR6, painted and detailed a little to replicate a wartime BMW R45 bike of the time; probably its because this is the model Steve and his pal Bud rode to great effect across the SoCal dessert. Nevertheless it is still one of the most classic bike scenes in ANY movie!
Below: a replica built for the Imprial War Museum exhibition on the G.E. in 2005/6 - A 1960 T110.