Rare machine here folks!! This is a refinished machine by either a factory authorized dealer or a shop did this. Notice the badge is missing and the decals are nothing like what was offered from the factory. Buy the Singer dealers would refinish machines with supplied decals from the company. I need to see a photo of the handwheel from a 3/4 view so I can see the length of the shaft. I am thinking they took the extension off so they could use a shorter 66 style of hand wheel.
Billy