MARX MILITARY VEHICLES

The MARX Military vehicles series really do remind me of Century /JR21 toys. We know that the C21 Mobile Bridge carrier is probably the same body as the Marx Tank (above top). I've noticed a similarity, albeit less clear, between the Marx Amphibious Vehicle  (second from bottom) and the JR21 Missile launcher (bottom). I wonder if there is a JR21 version of the Marx Armoured Personnel Carrier (second from top)?