ROBOT BULLDOZER "US BUILDERS" - MARUSAN - JAPAN

A lithographed blue tin bulldozer with a red robot holding a flag in his hand. US BUILDERS is marked on the engine cover. Friction powered, the robot raises and lowers the flag in hand when pushed. 7" 17cm

Newspaper ads date the yellow version to August 1958.

There are two versions of this bulldozer both having the same box.
1 Yellow with a black robot. 2 Blue with a red robot