Yes, That is the famous Singer slant needle 401A. It has built in stitches as well as cams, It has a buttonholer and I have a monogrammer. It is very heavy all metal. I t 's great for machine quilting, If I could only do it.
It came out in the 50's. My grams was my 1926 Singer. I can't say no to a singer they want to sell for under $5; :D They need a good home.