The DSA US, the original one, was in my luggage during this trip in South of France.
A very nice and pleasant companion to travel with, for sure.
The alarm helps you to remind the aperitive time, which is a religion, in this part of France, or, more conventionally, to wake up for some long trips.
Here, at Saint Remy de Provence:
Under the sun,
Or during the road trip, with the appropriate driving gloves whiich perfectly match with the strap.
The devil is in the details.... 
Driving a vintage car with a vintage watch is the summum of pleasure.
Best,
Nicolas