The Defiance Lantern and Stamping company was formed by William C. Embury in 1900 in Rochester. He had a falling out with his other investors in 1908 and left the company to form the W. C. Embury Co. The No. O Perfect was made by Defiance from 1914 until 1930 when Defiance was purchased by Embury. I have attached a link from Dennis Pearson's Classic Lanterns site which show a picture of the No. 0 Perfect lantern.