I had never even heard of this watch until a few days ago, Universal Geneve's RailRouter from the early 1960s.
Apparently this model predated their Unisonic technology by only a few years, rendering these mechanical
chronometers charmingly obsolete. A bit of research has turned up a few references with slight variations in case and
dial, and one example with a movement including a swan's-neck regulator. There seems to be disagreement
regarding the jeweling (19 vs. 17), if I had the temerity to remove the hacking mechanism I would know for sure. The
movement is fully adjusted and sports an admirable functional finish:
