This might be too OT for the forum- I'll defer to the moderator.

Not sure exactly what information you're looking for. These Colt replica cap & ball revolvers are made by a number of companies in Europe, and in a wide range of qualities. Some I've seen are excellent, some I wouldn't shoot.

Traditionally, at least, "Navy" has meant .36 caliber, and the .44s have been "Army".

The open-frame Colt replicas are not the strongest of designs, and accuracy suffers from the fact that the rear sight is a notch in the hammer. The Remington replicas with the top strap are stronger and tend to be more accurate, but I'm not terribly fond of them, they're very barrel-heavy. The Ruger is probably the finest cap & ball revolver out there, and worth what they ask, stainless or not... but still very barrel-heavy for my taste.

Please be sure to use tight-fitting balls and put grease in the chamber after the ball; otherwise it's possible to get a cross-fire between chambers that will set off multiple charges at once, when they're not aligned with the barrel. On the back of the cylinder between each pair of nipples (that hold the caps) there is a small protrusion (Colt) or notch (Remington and Ruger) that is designed to hold the hammer so that it's NOT resting on a live cap- anytime it's loaded and you're not shooting, the hammer should be there. Cocking the hammer aligns it with the chamber again. Don't ask me why they did away with this when they went to cartridges.

Uberti is pretty good, overall, but even they are not in the league with the orignal Colts, and all of the Italian Colt replicas I've seen use very soft steel for the screws. Wear is not usually a problem, but have good flat-ground gunsmith screwdrivers if you intend to work on them, and spare screws don't hurt.