I'm never going to be a great photographer, but I sure like the gear. My old IWC mark XI is properly the one watch I will never part with. Yours Jacob/Copenhagen ...
If i get the chance to purchase one, iβd refurbish all the gaskets and service the movement, then, iβd wear it daily as it should - a true tool-watch. Nice photography there.
These watches were regulary send to the depot for service, and was fitted with whatever parts were at hand. Hence the many variants we now see. Yours Jacob /Copenhagen