Hi and welcome!
The Weil Antilope is listed as being created in 1945, so your bottle is of a 65 year vintage or younger.
As for the Guerlain, a lot of those bottles pop up every so often on ebay, but they quite tricky to date. Our master of all things Guerlain (Mr Guerlain) might be able to give you a good idea though, as might some others here.
Lovely items, by the way.