Here's a rare U-1812 cream colored porcelain slot top insulator incuse marked with Taylor "Tunnicliff & Co" logo "1910." This manufacturer was previously not known to have made this U-1812. Most early slot top insulators were used in Iceland and Norway- usually marked with Bullers or NTP logo. Unlisted on NIA website. Has 2 teeny base glaze flakes and 2 teeny wire groove rough spots.

First email gets this rare insulator for only $45 plus 8.00 shipping. Thanks!