Plarailfans Great Custom Photo Sharing Site

That one is beautiful and one I had been searching for or one like it. Is that a Duplo or Dapol?

These have quite a history with them, sorry I'm a bit long - winded here. They were Hornby Dublo models originally (that was right back in the mid 1960's) Then Wrenn took over the tooling and produced more of them, then Wrenn ceased trading when the owners retired and the tools passed on to Dapol who put the body on a chassis of their own and then, subsequently sold the tools on to Hornby who still have them today so as you can see, this particular item, goes back through three previous manufacturers, over fifty years ! 
Some moulds and tools might only last a few years before they become worn out, but others like we have here can last decades, which I find a little puzzling really. I don't know if the mould was poor quality / defective, or if some injections cause more wear than others maybe ? 
I had a look at the Dapol factory in Wales many years ago, when you could pay an admission charge to walk round the site and I was amazed to see the machines squirt the plastic at high pressure into the moulds and all in about a second, or two. Then a seperate machine applied the the lettering with a quick drying paint / ink ?