Both insulators must have been made on Friday, as they both have manufacturing flaws and some in-service problems. The CD 145 W.G.M.Co. has manufactured flaws along with four flat chips on the very bottom of the base, Very crude. but an interesting insulator. See pictures for additional details. The CD 143 Candian Pacific RY Co{060} MLOD also has some manufacturing flaws and a small chip near the wire grove. See Pictures. Both have been setting next to each other in my collection for 50+ years. My asking price for the pair is $75.00 + the actual shipping cost.