This green U-3108 was manufactured by PHK (Porzellanfabrik Hermsdorf Klosterlausnitz) before it was incorporated into Hescho in 1923. It has the PHK logo which is not shown on the NIA (https://www.nia.org/general/pifous/logos/makers/hermsdorf.htm) website with the number 1384 stamped in two places as shown in the photos, high quality glaze without any damage. The insulator weighs 2 kg and its two parts are glued (cement?) together, as can be seen in the photo. Overall, a very great and high quality insulator from Germany. The price including shipping from Norway is USD 130, PayPal preferred. More photos on request.