Antikt frimurer med luftperler fra 1770'erneHeight 11 cm. Masonic glass first appeared in Holmegaard's catalogue in 1853, but has been produced throughout Europe since the beginning of the 18th century. They are richly represented in, among others, the Norwegian Hadeland catalogue from the 18th century. This model has fine inlaid air beads, a technique that requires great practice and experience from the glassmaker. The glass has cracks at the bottom and clear marks from the glassmaker's tools.