Omega Speedmaster cal. 321 missing chrono-parts

I recently bought a 105.012-63.

Unfortunately I noticed that there are a few parts missing :



One part could be the 321-1784?
The other part is attached to the lever 321-1720 like on the picture indicated by the arrow below:

This is a 321 Speedmaster movement where the missing parts are shown
Could one of the missing parts be this one?

Does someone know the exact reference of those parts?

THANK YOU FOR YOUR HELP.

Thank you for the link.
Until now I spotted following missing parts:

I have been told that this could be the same of the cal. 861


This is the other part missing:

This is probably the ref. 1784


The screw is also missing. Does someone know the reference of the screw?

Thank you

Found everything exception made for the ref. of the screw that holds the part 1784 in place (see picture attached)

Start/Stop Pusher:
320/321 1784
320 1754a

Reset Pusher:
320 1757a


Any idea what the reference of the screw is?

Thank you