Is Big Ben missing a gear?
If so, I think that I may have found it!

This photo was taken by a Kiev 88C medium format film camera and MIR-26B 3.5/45mm lens and Hoya SMC O[G] ø82 filter using Rollei Retro 80S film, the negative scanned by an Epson Perfection V600 and digitalized with Photoshop