This listing is for a glass tray and glass bead mosaic art game. The original book has design examples and reads "Designs for Glass Balls Mosaic." Made by ES GESCH. Patent No. 140,010. D.R.G.M. 600273. Registered and made in Austria. The Glass tray measures 5" x 5"x .25" thick; glass balls measure 6mm. The Glass tray reads "Registered, Made in CZTECO-SLOVAKIA" and comes with the original tweezers. Made in the early 1900s. Great RARE collector's piece or fun game to play!