Most visitors online was 1990 , on 7 Feb 2022
Thanks for sharing this, Bryan. I don't always get to see the eBay sales in the USA and missed this one. I have Moncas movement #7104 in my collection, which is a very similar beast (although mine doesn't have the screw weighted bimetallic balance wheel or its sprung dust cap).Here is another that sold recently;
SIGNED FOR JOHN MONCAS, OF LIVERPOOL. FUSEE CHAIN IS MISSING BUT FUSEE CONE / RATCHETS ARE GOOD. GOOD MAINSPRING, STAFF, AND TRAIN. PLATES AND ARE IMPECCABLY CLEAN BUT DETENT SPRING IS BROKEN - THE PICS SPEAK FOR THEMSELVES.www.ebay.com
There are several unusual features of 7103; I believe I can see a pallet frame with English jewel pallets, which would preclude a detent escapement but I can't make out what else is under there, so I'm not sure whether it actually is a spring detent, since the normal foot and attachment don't seem to be present. Although the escape wheel is thicker than the usual ratchet type, the tooth profiles aren't clear. The purpose of the steel piece screwed under the top plate next to the 'lever' isn't clear and looks roughly finished. The stud looks like a later replacement, and the visible jewel settings appear to be blued steel rather than the more usual brass....do you see anything?
The use of a jewel as the impulse pin was found to have advantages in reducing friction at this critical point and also limiting wear, which was clearly regarded as worth the extra cost of the jewel since it was universally adopted in subsequent lever escapements. The steel parts of the types II, III and V were probably easier to make and polish than the type I; none of these steel parts were directly engaged with the lever fork.The Massey I roller table is a single piece, whereas II and III include a roller jewel. I don't see what advantage either of these have over the Massey I that warrants the extra effort in their manufacture.
John,I was just looking at sold Moncas pocket watches on a live auction site (no, not that one). Many Moncas watches have been sold over the years, and many of them in ornate gold cases. One watch stood out from the others. It had a going barrel and a dial signed Rail Way Time Keeper. The silver case was a hunter case and looked like a US case, at least to me. In the US this watch would be called a "Swiss fake."
John,In the absence of any other information, I agree with Graham that this is a Swiss fake of a Moncas watch. But I would add that it was made for the American market. I assume the case is original. That case looks like a typical US case of the 1860-70s.
I said that on post 62, nothing above as changed my mind, someone took this Moncus watch, and converted it. Look again at the silver plate with CHRONOMETER on it. It was put there to hide the DETACHED LEVER by John Moncus.For what it's worth. I think this watch was made in Prescot. The Serial number, as Mike pointed, out is in a batch of watches all with a Massey II escapement. I then think the watch was later converted to whatever it is now, it could be a Detent, ie that odd plate they added with the word Chronometer. I think it would be hard to find a Swiss watch with that sprung dust cap. Any way you look at it, someone knew what he was doing. I like it. Could be London work.