I have an old Moss gearbox with a strange bellhousing and tailshaft mounting/extension. I got it from a guy who recently parted with an XK140 project, but I don't think it's 140. Closest I can figure it's from a pre-war Jaguar SS. The center and tailshaft look to be similar to one out of an AC Aceca. Asking mostly out of curiosity, I don't think it's rebuildable. Top two photos are mine, third is Aceca, last is '39 SS chassis.
If you know what this is, please let me know. Current plan is to make the bellhousing into a flowerpot.