This is an original box that would have contained multiple attachments and was included with a Singer machine sold in France. These boxes are quite rare and the lid is hinged and doesn’t remove completely adding to the uniqueness.
The box dimensions are approximately 6x2x2″ allowing it to hold the six basic Featherweight attachments – Ruffler, Shirring Foot, Binder, Adjustable Hemmer, Narrow Hemmer, Edge Stitcher.