VTG Sheridan Taunton Silversmiths Snifter Goblet

A brand new, but old, never used electroplated brass (E.P. Brass on the stamp, photo 3) goblet or snifter by Sheridan/Taunton Silversmiths, LTD. Was warehoused for a long time (photo 2) and upon opening it, it had a pink/orange hue. I polished it with brass polish, and it shined right up, but has some spotting as shown in last 4 photos - a small amount on the base & a little concentrated on side of body. Approx. measurements: Height 4 1/4" Opening 2 3/8" Base 2 5/8" Holds 8 oz.