I'm very new at this stuff, so I might not have this exactly correct but I'll try and get you started. The short story is that I think there's a part missing... the suspension spring... that is not shown in either of your pictures. I've annotated your pictures and the letters and numbers below refer to those pictures..
Okay.. the middle part, indicated by "A" in the picture on the right, is the anchor or verge that engages and regulates the escape wheel inside the movement. There should be a little thin pin, called a pivot, protruding from the spindle indicated by "A" and that pin would probably fit into the hole marked "B" in that other part (the "saddle," I think). It looks like the saddle would be held, through holes 1 and 2, to the backplate using screws 1 and 2 in the picture on the left, but I can't tell for SURE, and you want to look inside the movement to make sure those screws are not holding ANYTHING else in place before loosening them.
Under no circumstances should you loosen any screws that hold the front plate of the movement to the backplate of the movement (shown in the picture on the left) without FULLY releasing the mainsprings.
At the other end of the spindle ("A"), called an "arbor," should be another tiny pin that will go into a matching hole in the front plate that I can't quite make out in your picture, but it should be somewhere around where arrow "F" indicates. If the anchor is installed correctly, it should rotate freely and the two little tiny curved pieces of metal protruding from the anchor (called "pallets") should alternately engage teeth in the escape wheel just below it inside the movement.
Now.. between the part indicated by "C," and the part indicated by "D" at the top of the pendulum, there should be a flat spring of some kind, held in place by the pin at C, and usually a hook at D or another pin of some kind. I don't see that spring anywhere, and you need it. Others with WAY more experience can probably tell you exactly what movement you have just by looking at it, and what spring you need, but I don't have that experience or knowledge.
The parts indicated by the double headed arrow should fit together where indicated; the pendulum shaft rides inside that slot in the verge.
I hope that helps somewhat. I'm not sure you'll be able to just reassemble the clock, even if you had the spring, and expect it to run after having dropped it. Also not sure how that saddle came off the two screws holding it in place from a drop? My gut tells me you may need to take it to a shop.
I suggested your post be moved to the clock repair section, where you will be more likely to get the help you need. I’ve never seen an escapement like this, but I’m sure there are others who will jump in and point you in the right direction.
Follow Muse Chasers directions to put it back together.
To get the right size suspension spring, when you have the other parts on the clock (A and C) hold the pendulum in the slot at the bottom of A and balance the distance between the bottom and top of the narrow part of the pendulum while in that slot, then measure the distance from the inside top of the hook on the pendulum to the hole in C is about the right length of the suspension spring. Search Goggle forTimesavers and look at suspension springs with a hole in the top and a pin in the bottom and marry up the size as best you can.
Your clock is a Gustav Becker, a search will give you loads of info on him.