...really wonderful to see a post from you, Valentin! Always informative and thought-provoking to read your thoughts, and I remain grateful for all of the guidance that you have given me on photographic topics.
About the watch -- there is something really intriguing about it. To me it is the meeting of two ideas: the traditional point about hidden finishing (parts that will never be seen by the owner are beautifully finished just because) and Schrodinger's cat in a box, which is simultaneously dead and alive to the external viewer because that viewer cannot see inside.
So, a really intriguing thought experiment. But, I am afraid, way too expensive a thought experiment for me to consider! H1 or H2 would be splendid, though...
Best,
Gary G