Thanks for welcome words!
I would just like to add that I'm french canadian so my apologizes if my English is not perfect...
@ PaddleMore, it was in my grandpa's album, a jeweler, he had no interest of keeping fakes... That collection ended in the 1970s, he had no access to foreign catalogs, I would say he been fooled in a sale. I looked
ebay and it seems there are some fakes for sale for few $ when listed to 5k so 99% chances of a involuntary collect, 1% chance a voluntary collect, 0% chances of a real one haha!
@Peter, I will look to the link you posted, it can be helpful for other suspicious samples!
@ Russ, I share your point of view!
In overall, I learned a lot in last days, so you will be stuck with me around for some times :D Thanks to active members to share their knowledge!
Have a nice day,
Marc