Today this one, in mint condition. Most precise watch of the world and a worlds first (radio controlled wrist watch), Junghans Mega 1.
Just these days I managed to find a correct new old stock bracelet. It incorporates the antenna and today this is rare as hens teeth (as nos). When the bracelet is worn, the antenna tends to break. The bracelet cost me in a similar order of magnitude like the actual watch, but in both cases we are talking of < 200 €. Now I have a spare, just in case, so good for the next 30 years 😀.
One disadvantage is that it does not have a light function, i.e. you cannot read it in the dark. On the other hand, the same battery lasts now since about two years.