The tough part is that it's a Kienzle barrel for a 400 day disc pendulum clock. I am working with Chris from Horolovar on this restoration. He told me that this barrel is unique to Kienzle movements of this type ONLY. The reason being is that the barrel rests against the back plate which according to Chris is unusual as compared to other 400 day clocks. The existing barrel has 4 flattened teeth - I will get it repaired only as a last resort if it affordable. Except for the basic small parts needed (Horolovar supplied) to finish a 400 day clock, it's ready for that setup process. Needless to say my frustration level is quite highâ€¦ Everyone on the forum has been so helpful & patient during my membership. I have been taught a ton of things about clocks & the time that you all have saved me is immeasurable. I am hoping that someone will remember that they have a barrel buried away in a dusty boxâ€¦. I will give the dimensions of the barrel, even though I think a Keen Kienzlexpert will understand the situation right away without them. 72 teeth Diam. w/teeth > 42.2 mm Diam. w/o teeth > 39.3 mm Inside depth > 21.6 mm Height > 23.3 mm BTW > Serial #16277 The way Chris explains it is that the incorrect barrel will be jammed up against one of the plates.