I very much enjoyed this thorough tour of your movement and case, pointing out all the interesting bits of evidence or curiosity - thanks for the video!
It definitely looks to me that the case has been messed about with and that panel on the bottom looks very wrong. I think you are correct that the case doesn't match the movement, but it's likely that the movement matches the dial. You have to be very careful when trying to ecide whether cases match movements and dials. I have a late 1700's longcase with a lovely painted dial by Francis Byrne of Birmingham. In the example of my clock, you might think that the case doesn't quite match as the dial is not perfectly centred in the case (it's about 3mm shifted to the right, but there are no gaps visible around the edge of the dial). In actual fact, through a lot of research and by examining documented and photographed clocks by the same maker, I have managed to confirm that the case is absolutely correct and have found examples of cases made by the same cabinet maker, who was local to where the clock was made (Stokesley, North Yorkshire). The issue with mine is not the case, but the baseboard that the movement sits on. This board is undoubtedly original to the case as it fits like a glove, but it has so much wear around the hook holes that secure the movement, that I can't get the movement to securely sit where it once did, hence the 3mm shift to the right. I should really make a new baseboard, but I don't want to spoil the originality.
I 100% agree with what you say, it’s very difficult to find totally original Longcase clocks , the facts are they have been through many hands & often travel around the country, I have had a few that I could say are all born as one but this is a rare thing in it self.
You call them shoulders, I know them as cheeks and yes it is a marriage. As you point out that case has been through the wars. Sometimes it helps by looking at the false plate to help to see if the dial belongs to the movement with painted dials. Late painted dials always had more painting on them then the early ones and the painting was never very good. The calendar hand looks wrong. The width of the trunk doors are always thin on very early clocks with a glass so you can see the pendulum, as time progressed doors got shorter and very wide. I have come across many where the complete bottoms are different to the trunk. Keep up posting videos. I wish others would comment and not just me.
The glass is sometimes called an inspection glasses. It should be in the door to see the pendulum bob swinging. If you come across them and you can't see the bob you know the pendulum is not the original.
