Hong Kong plastic old toy soldier MARX 60s

I love MARX toy because this is Hong Kong Toy golden time , In 50-60s that time most toy export to worldwide. This is "WARRIORS OF THE WORLD" one box soldier. 

This is old hard plastic toy soldiers , but I don't why mark "UNBREAKABLE MODELS" 
if choice hard plastic made that time 60s is very easy broken ! 
I bought this soldiers set is lucky because not much money!