This is a genuine attachment for a vintage Singer sewing machine
"Singer Simanco 86642
Ruffler
Adjustable for 1, 6 or 12 stitch ruffling. Has an adjusting screw which regulates the fullness of the gather and an adjusting finger which sets the size of the plaits. For gathering the adjusting finger should be moved forwards towards the needle so that it is not in operation."
http://www.singersewinginfo.co.uk/simanco/86642/
The condition is shown in the photos. (I am not a sewing person so if there are any parts that you want to check work properly please ask questions and explain in basic details so I can check it for you)
Preloved Singer Simanco sewing machine attachment. Simanco 86642
There is no exchange or refund on craft patterns or kits. On other purchases - Exchange accepted within 7 days. Please contact me prior to returning the product. Buyers are responsible for return postage costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value. Contact me with any questions or concerns prior to placing the order. Individual stock items may differ from this general policy and will state in the information section if that is so.