Antique Demley Auto Dice 1920s In Pocket Gambling Device - Mechanical Dice. Great Art Deco design. Coolest little gadget ever!!! And 100 years old!!! Works well. Haven’t investigated whether it should ever be lubricated, or not. Have not tried to clean it. The back has scuff marks, etc, as shown in the third photo. The front is pretty much free from any blemishes. The “dice” are bright and reflective. Measures a little over 3” x 1 3/4”. Please let me know if you have any questions and I will do my best to answer them. Thank you for looking and happy bidding!!!