The piece to the far left (U-517) was made by The R. Thomas & Sons Co. It is an NN but was confirmed by Elton Gish to be the first U-517 attributed to Thomas SOLD. The middle piece (U-562) is dry process and is attributed to The Akron High Potential Porcelain Co (circa 1906) SOLD. The U-599 (far right) is actually a Pittsburg (thought it was a New Lex.).

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