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.
Inscription/Sig.
English directions on "HOW TO PROVE SPIRITS" is pasted on lid.
