The edition number
Usually expressed as 1/30, 2/30 Etc. shows that the print is from an edition of 30 copies. It does not mean that this was the first to be printed. It also means that there will only ever be 30 edition copies in existence.

The artist’s proof
Sometimes only marked A.P., more usually marked A.P. ¼ to show that this is one of four (or however many) proofs. These are the property of the artist and may be sold by them. The artist’s proofs are in addition to the limited edition and are usually restricted to 10% of the edition number. So, on an edition of 30 copies, there would be 3 artist’s proofs. Sometimes marked E.A. as in Epreuve d’Artiste.

Hors Commerce
A display copy (literally ‘outside trade’). Typically marked H.C. ½, Etc.

B.A.T.
The final preparatory proof. It stands for Bon A Tirer, ‘good to pull’. Sometimes marked ‘right to print’. The edition run is matched to this proof.

P.P.
A printer’s proof. The artist usually gives each collaborating printer a copy of the finished work. These are often dedicated to the person.

Archive Copies
It is common for studios to keep one or two copies of each image for their records.

Roman Numbered Copies
These are usually a sub-division of the edition. For instance, part of the edition may be printed on Japanese paper or on vellum, these might be distinguished by Roman numbering as in 1/X, 11/X, etc.

The Artist’s Signature
This is a sign of authorship and of approval.

The date
This shows when the work was made.

Watermarks
Some papermakers include a watermark in the sheet. These range from the discreet to the more flamboyant. Some, like Fabriano, run down the whole length of the paper. They are another sign of authenticity and a mark of quality.