Phil, I can’t help you with your requests, but I hope that the following information is useful to you.
His correct full name was Antonio De Dovitiis with a double “i”, and although he was always assumed to be Greek, he was actually born in Picerno, Potenza Province, Italy. His father was also Italian and in 1897 was designated consul of Uruguay in the city of Naples.
De Dovitiis had a military equipment store specialized in tailoring articles and bladed weapons (those made by Felix Bischof in Duisburg are sought after by collectors). It was located at 18 de Julio street no. 130, Montevideo and his trade name was “Res non verba” above two shaking hands.
He is described in one source as a person of trust and personal tailor of Julio Herrera y Obes, president of Uruguay between 1890-1894, and that he was commissioned to Europe with the purpose of purchasing modern armament, but he bought obsolete 11 mm M. 71 rifles. This was considered a big mistake and in circumstances unknown to me the solution was put in hands of Paul Darche, a Parisian noted for the design of a semiautomatic rifle intended for a very short cartridge with a rimless bottlenecked case (coincidentally, one of the patents for this design was filled in 1893 as “Paul Darche in Montevideo”). I don’t know what was his relation with SFAP or why the 6.5 mm D’Audeteau No. 12 was chosen for the conversion of the Mauser rifles.