I have the singer one that I bought to go wit my Singr 401 in the early 60's. Even after I bough several newer machines, I went back to my 401 to make my buttonholes. Only since I bought my Baby Lock Ellisomo have I started using it to make buttonholes because it will make several styles. Buttoholers are l;ike friends, make new ones but keep the old, one is silver and the other is gold!!!! LOL