any old one anything before 1990. I have a few old irons, a couple for the 50's and one for the 70's. First of all they get very hot!!!! second the don't shut off...will stay hot the whole time in use...because of safety reason today's irons don't get too hot which is bad for us quilters....if you want to see my irons I will post pix for you. One cost $3.00 at a yard sell and the other was 10.00. I got a 100.00 dollar (will not mention names but, it starts with an R) and returned after two weeks. Started leaking!!!!!!