How can I tell if my picture is an original or a print?
This is one of the trickiest areas of art valuation. Watercolours can look like prints and vice versa, while some prints are deliberately produced to simulate watercolours or even oil paintings.
Give us all the information you have, and in many cases we are able to make an accurate judgement without physically inspecting the picture.
Some tips about identifying different types of picture may be found here.