The one on the left is a fantastic Lime Green color that has a very slight frosty textured manufactured surface. [005] marking with a circle on the top of the dome, F-skirt Patent/Dec 19, 1871, R-skirt a large 5 SB. I picked this off a local exchange line over 50 years ago. The asking price is $95.00 plus actual postage.

The one on the right is a super nice [020] in an off-clear color. Front crown Pat. Dec. 1871 Front skirt "D" Rear crown a small 5. SB. I picked this off the same pole as the above insulator. So the two have been friends for a really long time. The asking price is $75.00 plus the actual shipping cost. Buy together an same on shipping cost. BOTH INSULATORS ARE IN Very, Very, Very Near Mint CONDITION.