I posted pictures of the wonderful Century 21 HURDLER earlier in the year on the main blog. I've still not worked out what it is that the Hurdler is driving over? Bright orange glass? Lava? Since getting it I have come across similar if not identical versions by Marx, all HILL CLIMBING and in civilian and military styles.
Marx also did a realted range of HILL CLIMBING trucks such as the DUMP and the WRECKER (below). This naturally begs the question, whether Century 21 did too?