This auction is for a set of mint in box plastic copies of Matchbox's #18B Caterpillar bulldozer and #6A quarry truck.   Each toy was made in Hong Kong during the 1950s by Polythene Miniatures.  The bulldozer is yellow with a black blade and wheels.  It is 2 inches long.  The dump truck is pink with a red dumper and black wheels.  It is 1.75 in. long.  I combine shipping for multiple purchases.