Meaning of Amen glass

Amen' glass"

Pronunciation: (ā"men', ä"men'), [key]
  1. a British glass of the mid-18th century, having engraved on it a sentiment favoring the cause of the Old Pretender, concluded with the word “Amen.”
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.