I'm not fond of 15-91's. Not sure why. They look all hunched up. If you want a potted singer, why not get a 101/201, both elegant and beautiful machines. My wife loves all things Swedish, so I have fixed up a few 50/60's Husqvarnas, but am not fond of them: too much plastic, and why put a drive belt where it's hard to adjust and where you're guaranteed it will be oil-soaked: dumb.