Now pay attention. -- Left is the much harder to find double ribbed CD 217 Armstrong, NOT the common as dirt single ribbed CD 216 Armstrong. This rootbeer unit has what looks to me to be a factory mark on top but I'll call it a pinprick just in case. This is the only unit designated this CD #. Easily VNM. Middle is a CD 218 Hemingray- 660. I actually picked this light straw/clear unit off a 69 KV line on Penn Power property over 10 yrs ago. It was used on the static and we were re-insulating the static and conductors. I see slight wear to the tips of the ears. Again, this is the only unit designated this CD #. Easily VNM. Right is a CD 219 Hemingray-660 / Lowex. This honey amber (040) has two little dot size fisheyes on reverse. Easily VNM. Take this cool trio for $55.00 + shipping. First email that says' "I'll take it.". No PayPal. Email with questions.