I'm collecting the engraved stamps of Wilhelm Gottfried (also known as Guillermo Godofredo) Nüesch and have just come across this revenue stamp which I believe he may well have engraved.

I've read somewhere that he engraved the following revenue stamps for Argentina:
1894 oficina quimica municipal de Buenos Aires
1898 tabacos
1898 inhumaciones
1898 derecho de guia y de piso de la direccion de abasto
1900 sanitarios y productos medicinales
I do not have any information on these but this particular stamp does sort of fit the 1894 revenue stamp description.
Does anyone have any more information on any of these? Pics perhaps? Or a suggestion for a revenue catalogue maybe? Anything will be hugely appreciated!