1.25" with covered back and bar pin which has 1898 patent date although no maker name. Most likely the company was Pin-Lock. Photo, without dot pattern, shows one woman leaning against a table while to her right a second nude woman sits looking down at a white cat in her lap. Cat is difficult to see without magnification. Minor surface wear in reflected light. Exc. and displays Mint. Only example we've seen. See pocket mirror nudes #620.