This Rolex Submariner service & repair found mysterious rust

Full service of a Rolex 3135 movement. If you have a watch you'd like to have serviced, repaired or restored checkout https://gentlemenswatches.co.uk If you'd like to see more information about the odd history of the 'Sea Dweller' checkout the marvellous investigation by Jose Pereztroika https://perezcope.com/2023/12/24/spac...