How does a tantalus lock work?

A metal bar runs across the stoppers of the decanters, secured at one end by a spring lock operated with a key. Turning the key releases the bar so it can swing upward, allowing the bottles to be lifted from their fitted base. Without the key, the stoppers remain trapped beneath the bar, preventing the decanters from being removed from the wooden housing.

What is the difference between a tantalus and a decanter case?

A tantalus exposes the bodies of the crystal decanters while locking them in place by their necks and stoppers. A decanter case fully encloses the bottles within a lidded wooden box that locks over them entirely. Both serve the same protective function of guarding the contents, but they display the glassware differently within a room.

How do I date an oak tantalus?

Dating relies on the style of the woodwork, the patent marks on the lock, and the cut of the crystal decanters. Victorian examples often feature heavy brass mountings and darker oak finishes, while Edwardian versions can be lighter in tone. Silver hallmarks on the bottle collars or mounts provide precise year markers through assay office date letters.

Were these used in homes or offices?

These pieces belonged in domestic spaces such as dining rooms, libraries, and studies of wealthy households. They allowed hosts to store expensive spirits securely while displaying the cut crystal decanters to guests. The lock prevented domestic staff or unauthorised household members from helping themselves to the contents.