says invalid, I too have a spartan that had the bottom broken. Bought off ebay. contacted the seller and he had me send pictures of my spartan and it ended up I got my money back and was able to keep the machine as he had taken out insurance. I believe he has done that before so he is not out any money and collected big on the machine. She is a nice little machine. I am on the lookout for the pedal and power cord for a new 301a that I purchased w/o a power cord thinking I had one that would fit. Machine not here yet, but I think it takes the 3 prong plug end.