With 14 circular ridges above, and 10 left hand spiral ridges below the wire groove,........this is the grooviest Canadian insulator made. This is CD 143 (100). light Green. Condition is better than most, and these are getting to be as rare as the purple (110) variety. There are no heavy chips or cracks, but there are about five areas of light nicking/chipping scattered about. Looking to get what I paid for this piece in auction about three years ago. 340, shipped