"Janusian Inkwell.... Which Testifies Your Mood"
Depending on whether you are melancholy, or even sad... or in a joyful mood, or even feeling like laughing, you could show your state of mind by turning over your Janusian inkwell.... Your interlocutor would be notified. , without a word being said. Always adorned with its porcelain ink cup. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato