Nice yellow and green topped ligtning arresters in great conditon - $40 each or the pair for $70 plus actual shipping -- I think these will fit in medium flat rate boxes.

Joe maurath provided the following information and the permission to share:

"These indeed are rare and all I know of have come from Central MA. Most are gone now owing to higher primary voltage conversions since the 1990s. The yellow-tops and green tops in this style come in slightly differing shades. Most were retrieved (unfortunately) without their mounting brackets. Jeff Kaminski has been instrumental in saving as many (or few?) of these for our hobby as he could through the years. In addition, the differing colors had nothing to do with coding as far as we know. They also are known with matching brown tops as well.... I'd date these as 1930s-1940s. Forward this info to any others as you feel."