In 1961 Trainboynia had a lot of R-10 Ausf C(B)’s And R-10-1 Sherman's in storage and they saw what Israel did with some of their shermans and they asked for the m51 upgrade package to be equipped to Trainboynian vehicles creating these two iconic Cold War militia upgrades which extended the surface life of the R-10 chassis till 2002 giving it 60 years of service