Here's a link to a set of flags I've put together for the Black Bande of Giovanni de Medici. The information was provided by Robbie Rodiss who provided most of the description of the black bande described below, here's the link: link
The info comes from the book the Black Bands of Giovanni by Maurizio Arfaioli, which can be purchased via Amazon. .
In brief Maurizio describes Di Medici as being ahead of his time in that he organised his large mercenary band to be able to take on diverse roles on the battlefield. While the Swiss and Landsknecht units tended to still be the battlefield winner, they refused to get embroiled in close skirmish work, ambushes, sieges and virtually anything that didn't entail close order push of pike. That doesn't mean they couldn't do it, just they were reluctant to stand the causalities that such fighting risked.The Italian Black Bande in 1527 was organised in 15 companies totaling 4,229 men.
The band did have a backbone of pike however the majority of the band were heavily armed arqubusiers, ie they were equipped to fight at close range with any weapon they wished to carry, usually sword and dagger. It seems clear that the band operated in close support of each troop type.The band under Giovanni could be mounted on smaller Arabian horses to allow them to recce the area and also act as an early form of dragoon. The band were mercenaries, however they were well drilled and clearly sought after by the Italian states. In fact the French were reluctant to undertake the invasion of Naples until they were sure the band was coming south with them.
Dress wise, the band dressed in sombre colours, certainly after the death of Giovanni di Medici. The officers wore black sashes. Mention is made of the armour being very dark which suggests to me that it may have been more of a very dark gunmetal colour or blackened. One thing of particular interest is mention of the use of a devil motif on company standards and even emblazoned on several officers clothing and the captain of the Bande bearing a black flag with the 4 devils embroidered on it and the motto 'In spite of you Christ' in Latin.
cheers Pete