Hartford porcelain decorative plates w/Lyons Cobalt Blue set of 2 Argentina Vtg

Get This pair of decorative plates, are Cobalt Blue and White, Has the mark in the Back Hartford in green with an R circled, Industria Argentina and the letters T-N all in green. The plates have a Crowned Lyon in the center with arabesques and leaves motif throughout. The measure 7" in diameter . one of the plates have a blemish in the back, I believe it is from the metal hanger was used to display, when I rub my nail through it does not change.