Here is a nice grouping of porcelain -- Prices as shown plus actual postage (I can usually fit 5-6 in a flat $10.20 rate box) -- From left to right:

-- British style, only marking is an incuse U on the top - skirt stress crack -- $2

-- British style - insulator logo & MADE IN ENGLAND on the top -- good condition -- $3

-- Great unmarked porcelain dead-end style - good condition -- $4

-- Nice glaze beehive marked MP -- some nibbling at the lower wire groove -- $3

-- Mottled glaze beehive marked G.P.Co. -- small wire groove flake as seen -- $3

-- Unusual dark glaze signal, probably Pittsburg -- VNM - marks in wire groove appear to be glaze defects and not a wire rub. -- $2 (SOLD)

-- Great glaze haystack - unmarked base ping and a couple tiny flakes -- $4 (SOLD)

-- dry process signal marked THOMAS -- good condition -- $3

-- Very unusual signal in great color marked OB (ohio Brass) in good condition -- $5 (SOLD)

-- unusual chocolate brown style marked PP (Porcelain Products) in good condition -- $3 (SOLD)