I have an opportunity of purchasing a "1876 Domestic D treadle" in a very nice cabinet...belt broken but machine has no rust and graphic very nice...I wasn't able to open plate where bobbin is...I'm assuming that's where it is...to see what kind of bobbin it takes if it had one to begin with...Can anyone tell me anything abt this machine and is it worth my consideration...can parts be found...i.e.bobbins, belts, feet...it's only 50.00