Your question beats me....because the pictures were taken by a friend of mine who is a professional photographer. I will relay your question to him. I noticed that he uses wet and dry tissue paper to clean the surface a lot.
The blue hands of the anniversary model are amazing...wish we could find them also in non-limited reference as opposed to the non-blue hand they use which have less legibility I find
By: Chronometer (aka yacomino) : January 27th, 2021-03:55