The Italian model maker Polistil
made a range of six 1/50 scale diecast tanks in the 1970s (1974-1976). This page has detailed photo sets of each model.
The main differences compared to the Solido type tanks is the track link
construction. Solido used a very detailed diecast track link and
Polistil used a stamped metal track link that is much easier to produce
but does not look as realistic as the Solido track link.
Do you have Playme or Polistil tanks that are not on these pages? Contact me at thesimp+tank AT gmail.com
Not much info is available on Polistil tanks. Here is one site with Polistil some pictures: Mike's Tanks Polistil page