Here's a somewhat scarce U-1929A porcelain dryspot from England. Has the scarce "Patent." incuse embossing on the dome and "26" inside the inner skirt (indicates production date of 1926)! Likely a Bullers product. Does not have the inner threaded pin. First one of these I've seen with its historic tie wire intact! Most of these I've seen are unmarked. Some light surface scratches. No cracks or chips.

First email gets this scarce insulator for only $100 shipped! Thanks