Here we have an Awesome Tuttle & Bailey Antique Louver for a Round Floor Grate. The patent date is Sept.7,1875. It is 10″ in diameter. It is in good condition and clean. Has one problem though. The louver part with the patent date has a broken tab on the left side so needs someone with restoration abilities. But this could be made to work again with a bit of work and knowhow.
Thanks for looking!