Bernhard J
·My guess is the case is 18-karat gold? The inevitable question……..is the movement maker identified? Face up, I’d call it a chronograph. But the complicated looking movement might indicate there is more to it than that. The watch appears to be pin-set, but if it is a chronograph, there is no stop-start and re-set button in evidence. You must have anticipated questions. Such watches are not a focus of mine, but I think I’d have jumped on that one! Outstanding!
Yes, 18K case, including the cuvette.
No, it is completely useless as a chronograph. First, because it can show seconds only, and not fractions of seconds. Second, because there is no reset function. And yes, the slider at the circumference of the case is for stopping and starting the seconds hand. Other than the English "centre seconds chronograph" (which neither was a chronograph) the movement continues running if the seconds hand is stopped.
Remember that chronographs, like we know them today (start/stop/reset, movement of course continuing to run), had been invented earlier by Nicole. This watch presumably was made 1870 - 1880, the invention of the chronograph goes back to the 1840s.
I assume that it was an attractive novelty and very expensive due to the complicated movement, which also attracted "afficionados" in that era. Interesting is, that the same result (centre seconds hand jumping in one seconds steps) had been achieved earlier with the "chinese" duplex, and with comparatively very simple means (resulting in low precision and low reliability)
And no, the complexity of the movement does nothing more than providing for the independent dead beat seconds hand. One going train as usual, and the other train for nothing else than this seconds hands motion.
And today observers - taking a glance only - will suppose that the watch has a cheap Asian quartz movement. So, nothing to "show-off". Presumably that is the reason why nobody wants it today.
My research has not yet led to a manufacturer of the movement. But it is sure that it was one of the few premium Swiss firms of the time. What I have found is this
https://german242.com/en/product/2-0173-james-nardin-seconde-morte-jumping-seconds-1870s/
Surely the same manufacturer of the movement, as is it nearly identical, but the signature presumably does not tell the maker of the movement.
Cheers, Bernhard