Been looking over the gun, and it is a sort of Kirst/Mason conversion.
The loading gate section is attached, not sure how.
So, picture 1...
Red circle is the handle of the ejector rod, Yellow circle is the head of the cylinder pin, which is standard 1858, except one of the "wings" has been removed to give clearance for the ejector rod handle. Blue circle is a notch cut out of the original loading lever into which the head of the ejector rod folds during regular use.
![](http://i1282.photobucket.com/albums/a523/electricminer/IMG_8805-small_zpsa28ae39e.jpg)
Picture 2...
Same thing from the other side.
![](http://i1282.photobucket.com/albums/a523/electricminer/IMG_8806-small_zpsc07d2e27.jpg)
Picture 3...
Various levers in shooting position. Red circle is end of ejection rod folded into the notch in the loading lever. Yellow circle is end of cylinder pin.
![](http://i1282.photobucket.com/albums/a523/electricminer/IMG_8808-small_zpsb21a31be.jpg)
Picture 4...
Underside of barrel. Red circle is end of ejection rod folded into the notch in the loading lever. Yellow circle is end of cylinder pin.
![](http://i1282.photobucket.com/albums/a523/electricminer/IMG_8807-small_zps185ab8d4.jpg)
In this pistol, the loading lever serves no purpose, save to keep the 1858 appearance. You have to drop it to use the ejector, or to remove the cylinder, but if you drop it too far, it keeps the cylinder from turning. I could just remove it, if I had a mind to, without affecting performance of the gun.