Nice collection of vintage Singer low shank blackside accessories. If you are lucky enough to own one of the rare Blackside Singer Featherweights this set is the perfect accompaniment for your machine.  The blackside machines and accessories were manufactured from 1941-1953 due to a shortage of nickel and chromium from World War II.  And, otherwise it's a fun set of Featherweight and other low shank Singer machines to add to your collection.