I believe what Ade and Steve say,because i am non expert and i don't have an opinion on my own for these items !
Unfortunately,my grandpa passed away a few years ago,so i can't ask exactly when and where he bought it :-(
I made a search for these repros,and found two differences from mine
1)The wooden handles of them are marked,mine isn't
2)The handles have a dark color,but the color of mine is brighter
Could these differences mean something ?
Thanks so much for your information guys,your experience has no match !
(Forgive me for my English...)