now I understand a little more' thank you, I have been able to translate from the Italian forum someone sent me here few words and it appears that the brass model with the long blade it very rare. I am very happy about that, because when I bought it I did now know it is made from brass it was so dirty that you could not tell and it did not fold then.
I have guessed it is rare because I have never seen another one like it on the internet anywhere for few years until now, in that Italian site.
so thank you all for your help finding out, I have few more cool stuff I will upload later.
Yes, in Italy is very rare, but only because all the production was sent to Egypt.
Perhaps in Egypt they are common.....