I recently purchased a sellita sw-200-1 movement and it was working fine. When I wanted to recase it the stem went loose and I had to reassemble the keyless work to get it to work properly. I then realized that the movement stopped working. Upon further inspection I found out that the escape wheel isn't engaged with the second wheel. The escape wheel is also very loose on the top part close to the bridge. Do I have to replace my escape wheel and what seems to be the problem? Is there a pin at the top which was sheared off? Thanks.
VID_20180304_231841.mp4