Item MW084, N-6A, CONGRESS HALL MINERAL SPRING / O. D. PHELPS PROP / AVON. N. Y, aqua, Quart, Smooth Base, bold embossing, applied top, nicely whittled, has numerous bubbles in the glass, perfect condition. I have only three auction prices for this bottle. In 2010 one brought $4888 at auction. A great example of this very rare bottle, circa 1870 to 1880, $2,100