PRR Gon info request


Haven't found this in the archives, and my black letter on white paper
sources are unclear. I'm doing some research on high capacity gondolas
(Gene Huddleston has convinced me not to call them "battleship" gons).
PRR had a 110 ton gon, #306001, class G23.

Was this a one-of-a-kind? Any idea what years?
Pointing me to an appropriate available reference would also be
appreciated. Thank you.

Frank Bongiovanni

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