I have searched various possible sources, and am sure I have missed it somewhere - I thought, before I looked that it was Davidson, but don't see it on that site. 180mm/7.1/16 square - 80mm/3.1/16 high. No evidence of water staining whatsoever, and regrettably no marks of any kind. In fact just as clean and shiny (apart from some scratches of course) on the inside as the outside. although fair amount of wear on the feet. Therefore, a bit clueless as to original purpose. Any guidance as to maker and age will be very much appreciated, and thanks for looking.