Take a look at this Universal Geneve Compax, 18k solid gold (stamped case back), pictured below.
The watch is off to a watch maker to get a quote for a full service/overhaul. The watch is running at the moment, but it definitely needs a service.
I'm told everything is original, never polished/replaced. One owner before the current owner. I don't have any particular concern in mind, but I don't have an educated eye for UG watches - I don't know what to look for. Can someone help me identify the movement and if the rest of the watch looks original to you? The 12 marker is the only thing that stands out to me as unusual.