Here is one of Canada's mysterious insulators created with double threads making them hard to screw onto a peg. These are getting very hard to find and are the threaded version of the CD 743 with 1/2 inch thick base glass. This has a few issues with a clamshell like hit on the crown, a fish eye on the skirt and some base nibbling. More pics upon request. I consider these somewhat under valued in the guide and with the issue's i'm asking only $225.00 U.S. + shipping. I accept PayPal in family friends mode and also checks.