Lego Architecture 21013 London Big Ben Clock With Guard Minifigure Incomplete

This is from the retired LEGO Architecture set 21013 for London’s Big Ben clock tower. It has been built and comes with a British Royal Guard minifigure that wasn’t originally from the set. It is missing the box or instructions and it is incomplete. I know there is a piece missing on the top of the tower and there are possibly some other pieces missing. Everything I have is listed in the photos. Everything is also in good pre-owned condition with minimal signs of wear and use. Please let me know if you have any questions or would like any additional photos. $.50 from every sale goes to our local food bank. Please let me know if you have any questions regarding this. Thanks :)