I would never buy a vintage machine that says it is made industrial strenght and can sew through leather. If it had been used to sew through leather I will not buy it as I do not believe they were made for that. I would love to see piecing on a Feather Weight and singer 301 and maybe also on singer 15-91, 201 and also maybe quilting on those last two if they come with the right attachments. I think it would be nice to add some of the after market feet like for piecing so it is already to go for a quilter. I would look for good tension and different stitch lengthand I would like to hear the sound of the motor.