I think U-N can make complex yet rugged and reliable watches
The marine perpetual falls into that category as well as the watch you are considering.
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The UN tourby is also a watch i want and like. I saw the picture you posted, my eye fell quickly on it. Many fans of the watch here. I check the market price from time to time. For a few years the price is stable.
Yes this is indeed a robust everyday watch
I have mine for 3 years now. I don't wear it daily but I know there is no problems if I wear it daily. Just wore it last week again In steel, with a rubber strap for humidity or water, with a screw down crown and 100m water resistance, no problems at all ...