For estate reasons, I’m trying to determine the value of some of my late father’s clocks. He was a long-time NAWCC member and Fellow of the British Horological Institute. This clock is a French crystal regulator made by HP & Co. (Honore Pons). It is 10” tall. My father described it as follows: “Glazed gilded brass case – 8-day mantel clock – hour and half-hour strike on bell – 3 ½” enamel dial – Roman numerals – marked HP and Co. 2598, Serial No, 11,548. Top and base of case are oval and the four bevelled glass panels are curved accordingly. Side panels flare out at the top and bottom. Originally mercury gilded or plated; has since been gold plated. Flawless condition. Circa 1870-1890.” I can add that “Paris” can be seen on the dial but the rest is too worn to read. And that I wound it and it has been running and chiming for days. I am having trouble determining its value because of the scarcity of brass-and-glass HP Co clocks on line. Any information you can give me would be much appreciated.