WOW what an absolutely awesome machine! I have never seen one like it before. A hand crank that transitions to a treadle, it must have been a very expensive machine for its time. The tin is totally cool as well I believe that she felt the machine had a history that needed to be shared and that you would preserve it and share with the future. Thank you so much for sharing I have always loved Pfaff machines and this is just one more piece of there history.