one thing. Notice that there is no wear ring on the cylinder. That is because the bolt engages the cylinder from the rear on these guns. The problem with this design is that the cylinder is free to spin unless the trigger is pulled to the rear or if the hammer is cocked as in single action use. Colt used this same basic lock work on their 1889 model with the first swing out cylinder design they made. It has the same problem so Colt "fixed" it when they went to the next lock work design in 1892.
No wear ring on cylinder
Notice the locking slots between the chambers on the rear of the cylinder
