In 1974, when creating the 8 page catalog (http://www.artifactcollectors.com/diego-history-4330818.html#11 ) for Diego. I had him (Coop Cooprider, Diego Voci Art Historian) brush his signature with India Ink.
Here is that original with the printer’s notes at the top. This signature became the icon for branding Diego Voci (VOH-chee).
See his other signatures (http://en.wikipedia.org/wiki/Antonio_Diego_Voci )