Carrier 1851 Reprint Or Original ?

Good morning

Good Sunday, I wanted to ask you if it's a reprint or is it original?

greetings SImone

This is a problematic question, since some of the the Franklin carrier reprints were made on the same rose-colored paper as the original. Criteria such as fluorescence under UV light and paper thickness measured in microns have been used to distinguish between the two. In terms of appearance, the originals are generally described as sharper and clearer in appearance, while the reprints can appear overinked or blurry. Here is what John Luff had to say about this (paraphrased in Donald Johnstone's article "Franklin and Eagle Carrier Stamps" in the USPCS Chronicle, No. 123 Aug 1984 p. 159):

"The impression of the originals is clear and fine, while the reprints are too heavily inked and often blurred. In the original stamps, the background of the medallion shows a hatching of diagonal lines. Traces of these lines can occasionally be seen in the reprints, but as a rule, the background appears to be solid. Around the medallion extends a tessellated band with rosettes at each corner. This band is composed of alternate light and dark diamonds crossed by groups of colorless lines. On the original stamps, these lines are clear and sharp, while on the reprints they are indistinct and often filled with color, especially where they cross the dark diamonds."

To my eyes, based on this description, your stamp looks to be an original rather than a reprint, but you can only tell so much from a photo. I suggest you examine it under magnification with the above criteria in mind.