Marx large size army truck, 1920s. Tin wind up.

Missing the canopy, but still really neat if you ask me. The Marx vehicles from this era are probably my favorite. Also, who doesn't love a good Mack C cab? Very simple mechanism, but they work surprisingly well considering.

This is the larger size that they made. You see the smaller ones now and again, but these big ones, not so much. It comes in at around 11", which is pretty significant for tinplate.