I offer for sale this CD 578.1 with a very clear and legible logo from the glassworks J.Stolle. Niemen. Big and heavy pre second war Polish insulator. It has an internal crack (shown on the next picture) on the back side but the crack is not palpable if you roll your fingernail through the glass outside or inside, so it can be something that arose during production. Price including shipping to USA is ONLY 37 USD, payable via PayPal. Thank you for your attention.