Here are some additional porcelain insulators -- prices as posted plus actual postage -- view original to see details. From left to right:

-- Unusually mounted insulator marked PIERCE in a great glaze - good condition -- $5 (SOLD)

-- Great stand-off in a near black glaze marked FLERON in good condition -- $5 (SOLD)

-- Less common unembossed strain -- small rub on the base and a place where it stuck to the kiln - $4

-- Larger unembossed strain -- good condition -- $4

-- blue-gray radio treated signal marked PINCO -- $3 (SOLD)

-- blue-gray radio trated signal (great glaze) marked LOCKE -- $4 (SOLD)

-- Unusual blue-gray style (U-425A) marked 1161 84 in good condition - $5 (SOLD)

-- Unusual blue-gray style (U-425) marked LAPP 1976 in good condition - $15 (SOLD)