The three commemoratives I am listing today are from a set produced by Canadian glass artisan Mark Lauckner. This particular style, very closely resembling a threadless CD 718 insulator, was produced in 1996 to celebrate 150 years of telegraph in Canada, and they were produced in a variety of incredible colours. These are base embossed with TELEGRAPH IN CANADA 1846-1996 and are signed, numbered and dated inside the pinhole. This one is a bubble filled Dark Green colour, and is numbered 20 of 50. This one has some additonal "crudity" with a neat bumpy surface on the dome and along the mold lines, just an awesome chunk of glass that looks spectacular backlit or underlit. Asking $28 + shipping. Thanks for looking!