I dont know if this machine is a clone 15....! It works in perfect conditions and it has more than 60 years. It is beautiful, it was of my grandma and I love it! Honestly, I know nothing about clones and this kind of staff. What I can tell you is that this machine was in my grandparents house for more than 60 years. If anyone can give me some information on this machine, the brand is "Vertex", place and period aprox, anything... would be great. Thank you!. Marķa