I would add the clones made by the basque manufacturers from the 1881's until well into the XX century, until the 1920's.
So I would add:
-Larra?aga, Garate y Compa?ia
-Garate y Compa?iaa (sucessors).
-Garate e Hijos (Garate and son).
-Hermanos Quintana (a Mexican gun dealer importing Colts 1873 clones and later making them in their own factory in Spain).
-Anitua y Charola.
-Orbea Hermanos y Compa?ia
You can see some of them here:
http://www.catalogacionarmas.com/public/30-colt-1.pdfhttp://www.catalogacionarmas.com/public/31-colt-2.pdfthey even patented later a simplified version of the COLT SAA, with one piece frame and two screws for mechanism, known as "Sistema COLT´S (reformado)".
Some of these revolvers were of good quality, others so so. Orbea at that time was the largest factory making pistols in SPAIN, so not all of the mentioned above were small manufacturers.
There were other brands in both Spain and Belgium making and selling these revolvers in Mexico and South America, so it was not the italians the firts ones making clones of the Colt SAA in the XX century ouside the USA.
In the late XIX century and the begining of the XX there was a big market in Mexico for firearms of affordable prices, so I would assume that many revolvers that we see in photos of the Mexican Revolution, could, in fact, not be Colts, but european clones of basque and Belgian origin.
The market was big in Argentina also, thought this was no place for the Colt SAA, but fot the Smith clones.
With a certain dismay, I have seen some respected authors writing reference books about Colt clones where they fail to recognize Garates, Orbeas, etc as spanish commercial revolvers, labelling them as "of unknown origin", despite being clearly marked with Orbea or Garate Hermanos logo, or with spanish and basque legends in the barrels, which shows that even expert authors can make mistakes when it comes to investigate guns made in a foreign non english speaking country.
many revolvers deliberately included barrels legends in English or Spanish, mentioning Colt or Winchester cartridges, in order to fool potential buyers into thinking that they were buying the original product. Most users would not speak english but would surely recognize the words "Colt" or " Winchester".
all the best