Bubbles vary slightly in size. Lid cracked on edge. Set of 12 glass beads on short stems, each weighted for a different specific gravity. Stem of "30" bubble partly broken off. Each bead etched with a number indicating the alcoholic content or degree of proof spirits in a volume of liquid. Fitted wooden case lined in black wool cloth. If the spirit was proof, the best would sink slowly to the bottom of the glass.
Materiale
English directions on "HOW TO PROVE SPIRITS" is pasted on lid.
