Help in authenticating Nina Ricci

[aeames]

How do you authenticate a pair of Nina Ricci vintage sunglasses?
I found and bought a beautiful pair of Nina Ricci oversized triangle shaped sunglasses at an antique shop in a tiny town. I paid very little for them, and wanted to know how to authenticate them.
They have the classic "N" on both arms. On the inside of one side is, Nina Ricci Paris. While on the other arm it has France NR3-50.
Thanks for any help.

 

[Circa Vintage Clothing]

Hi Aemes and welcome to the forums,

If you read this thread, it has some useful information for you - in particular:

Please remember that the VFG cannot authenticate or price items: a professional appraiser needs to see the item in person. You could also search closed auction results on ebay for similar items.

If you post pics, we can help you date them, and we might be able to give you some information about whether they could be authentic or not: older items are more likely to be authentic, or we can see signs of quality. To be honest, if they were in antique shop at a very cheap price they're unlikely to be original as the dealer would not want to make that mistake, but you never know: it happens.


UPDATE: have you tried Google? Is this them?

 

[aeames]

Here are a few pics, any info would be greatly appreciated if anyone knows about them.