Mary Kelly is a Singer treadle 15-88 Centenial from 1950 or so. I am very excited as she has a reverse and I can drop her feed dogs. She needs some TLC and does not have the best finnish. DH is going to work on cleaning her up and fixing her timing. This is all I know. Its owner was Mary Kelly, the treadle was bought on the East coast, spend a lot of time in New Mexico and then ended up in storage with Mary Kelly's grand daughter in California. I fully intend to put her to use quilting once she is up and running. I am very excited as I have been looking for a 1950 treadle because of the functions like the reverse.