Most visitors online was 1660 , on 12 Dec 2020
Have a look at this:Don't do too much clean up. To use it has to get hot and that darkens it a lot. I suspect it has not been used. If it had it would look a but roasted.
I have had one for years and never figured out a good way to mount the pallet. I am sure there is a way to do it that those in the know teach to students. Previous owner may have also lacked that knowledge and so never heated it.
Strange about the pivots... By the looks of it the pallets should be supported by the arbor when set it in this tool.Perhaps Dewey can explain. I saw and read the directions. Meanwhile I just lent mine the smartest watchmaker and general mechanical genius I know and await his instruction. When I get is and explains it to me, I will pass it along.
My problems has been getting the pallet mounted without damaging the pivots.Probably I am just stupid in this but my advice is to try it with some junk pallets before trying on an item you value.
I see! A problem with using the screw though would be that you won't know how much you have moved the jewel though. It's a comparator and not an absolute measuring tool. So if you move the screw to push the jewel in, you should get the same reading on the dial.Here is an inside view. You can view the down lever retracting the block moving to take measure. Turning the side screw pushes the "hammer" lever (see above) deeper, pushing the rubis if shellac is hot. To pull the rubis out, you need another tool like a small screwdriver. View attachment 658202