So, I was hoping to hear some input on these, as to whether anyone had knowledge of the ones that weren't as common or well known, especially.
The photos aren't much better on a PC monitor. The triggers on the derringer and the top break revolver are referred to as 'spur' triggers. A lot of those were made in Spain and Italy by various manufacturers. Some will be marked with a brand or maker's name, but many will not be. If they are old enough, they may not even have serial numbers. They were made to be inexpensive. Quality can range from not too bad to hazardous to fire, even when they were new.
The snubby with the H&R is a S&W knock off. Lots of those were imported from Spain, some of them were deceptively marked to make it appear to the uninitiated that they were Smith and Wessons, but the quality left much to be desired.
The .45 S&W revolver could be a 1917, either military or the commercial version. It also may be a 1937 Brazilian model, as many of those made it back the the U.S. Those are chambered for the .45 ACP to be used with 'half moon' clips to hold the cartridges. The clips are necessary to enable ejection of the rimless .45 ACP case. These days, 'full moon' clips and 'third moon' clips are available too.
![](http://picturearchive.gunauction.com/5093202347/10229322/img308.jpg_thumbnail0.jpg)
Another cartridge was developed called the .45 Auto Rim (AR) that will also work in these guns. It has a rim so the clips aren't needed.
It could also be a .455 Hand Ejector made for the British. A lot of those made it back to the U.S. as well and many were converted to fire the more common .45 ACP/Auto Rim. If it is in .45 Colt, that would really be rare. Very few of those were made in that configuration and would be worth a lot of money if in reasonable condition.
Those guns appear to be pretty rusty unless it is just an optical trick from the poor resolution.