Hi, I have had several opportunities to work on these type clocks and for some reason it appears to me that the movement will not run a full 8 days between windings. I have not conducted a properly verified test, but it just seems they run down before a weekly winding routine. Is it possible they were designed to be wound more often than weekly? It seems that maybe the mainspring being in a cage on the great wheel does not allow for 8 days run, or does it? Please note I do not know the proper name to this type movement and the movement pictured goes in internal and external bell clocks.. I know the movement pictured is missing the strike spring. thanks for any help restoring my sanity on this one. I am wondering if there is some thing wrong with the servicing work or if it was a design issue. Joe.