The classification is published in the section On the context of the Graphic Work under the heading Artistic criteria of the Fundació Gala-Salvador Dalí regarding graphic work.
In the category of Original Graphic Work, up to 1940, three types of works can be identified—unique graphic works, graphic works from editions, and singular graphic works—on the basis of the criteria detailed below:
ORIGINAL GRAPHIC WORK
1. Unique original work by Salvador Dalí (= 1 work)
• Unique original work by Salvador Dalí, resulting from a manual process
2. Unique original version by Salvador Dalí (1 version = 1 work)
• Unique original version by Salvador Dalí, resulting from a manual process
3. Original limited edition authorised by Salvador Dalí
• Individual or multiple original work in a limited edition authorised by Salvador Dalí
4. Original Open Edition authorised by Salvador Dalí
• Original open edition work by Salvador Dalí
5. Singular Original Work by Salvador Dalí (≥ 1 work)
• Singular original work by Salvador Dalí, resulting from various printing processes
For more information see Artistic criteria of the Fundació Gala-Salvador Dalí regarding graphic work: classification.