19th century black glass button. Based on Queen Victoria's penchant. | Glass buttons, Antique buttons, Vintage buttons
History of glass buttons - H Glass: original Czech glass buttons
Keep Homestead Museum | A historical museum with various exhibits.
Button history: a visual tour of button design through the ages.
Chart showing different kinds of glass buttons from the book, Introduction to Button Collecting by K… | Vintage glass buttons, Vintage sewing notions, Glass buttons