Amboy Works, Chapman, Rand Design. Purple Orchid Leaded Lamp,

Ed. From the original owner:

"When I contacted Reed & Barton, they did tell me they had two different glass makers they used at the time, they did not make the glass shades, they did tell me I needed to have the lamp checked out by someone who knew antique lamps. My former Father-in-law was living in a brownstone in the Bronx and his cousin was the janitor in the building, where they had a dumb waiter so he found a lot of stuff people got rid of when they moved, His cousin found the lamp in the dumbwaiter and asked my Father-in-law if he wanted it. That’s how it got in my family, my Husband said he never remembered not having it."

Ed. Original Attribution of Gorham changed to: Amboy Works, Chapman, Rand Design. Source: Reed & Barton Archives 1906-1911 Chapman Shade #90, Reed & Barton Base #B-30. The aperture size is 1 3/4".