Wow! wormbobskey:
I don't have the ASM CVA Schematic, so I can't varify the nipple size.
Armi San Marco CVA 1851 Navy .36 cal and .44 cal. revolvers may use the same size nipple as Pietta. But check it out cause I'm not real certain on this one.
Cabela's used to carry the "Davide Pedersoli " #015 nipple wrench which fits the Pietta guns perfectly (Nipple Size 6mm x .75mm). The last time I purchased from them it came with a set of 6 nipples for $21. This is a tough little wrench. Others I've bought broke easily, or were too large and stripped off the nipples as most wrenches are softer than the nipple.