Here's a rare U-1755 stamped with the Blue Scepter, trademark for KPM Konigliche Porzellan Manufaktur (Royal Porcelain Factory) Berlin. Company was founded in 1763 by Fredrick the Great of Prussia. Made circa 1870-1885. This example is in excellent condition and only has scattered light scratches and use marks and small rust spot in lower slot of crown. No chips or cracks! This variant measures 3 1/4" wide x 5 5/8" tall.
First email gets this desirable and rarely seen or offered U-1755 porcelain insulator for only $350 postpaid. Will accept payment divided in 2 months. Thanks