I am a lover of Nat Nast products, especially their silk camp shirts.  The quality cannot be beat.  I love the relaxed style, vivid colors and creative embroidery.

Since many sellers list Nat Nast products on ebay, I wanted to let you how to spot a "true" Nat Nast silk camp shirt.  I do not work for Nat Nast and I am not an expert.  The following is my opinion from years of experience selling Nat Nast on ebay. 

The buttons will be engraved with "Nat Nast Luxury Originals."

The label sewn into the shirt will also have "Nat Nast ® Luxury Originals Since 1946.  Make sure their logo - the lion wearing a crown is there too.

The embroidered Lion Logo can also be found at the front hem.

Inside the shirt you will find a white rectangle tag. This is sewn into the side seam.  I noticed that the older shirts do not have color name listed.

Whenever you purchase anything on ebay, make sure you are buying from a reputable seller. Check out their feedback. If you feel the item you purchased is a fake, contact ebay's safe harbor.