Oooch! That machine makes my head hurt! The face plate shape seems like it should be from a 15 and the bell shape of the nose does too but the tensioner's on the front so my brain screams that it has to be a 66 and there should be a horizontal bobbin the left of the needle but I just know it's a vertical, right? The RAF decal and the drop feed on the bed make me think it's one of the nostalgia series, but then there's the sewmaster label - so a knock off of a sanctioned knock off?