Here's a sim U-1686 (with cable slot) snow white porcelain stamped with the rare "Societe Amk De Fuisseaux Baudour DFB Belgique". Excellent condition with only a teeny 1/2 matchhead base flake and a teeny glaze hairline and couple teeny skirt scratch marks. Pin is nearly ready to come off with most sealant gone.

First email gets this tough and never offered before insulator from Belgium for only $150 plus shipping. Thanks!