Is A Mysterious Cipher Concealed Within The "Alchemical Hand Bell"?

[Still Waters]

Scholars are baffled by a mysterious object from Emperor Rudolf II’s collection: a hand bell, made from an alloy of seven metals and said to have been used to summon spirits, contains an enigmatic cipher on the inside.

The Habsburg emperor Rudolf II (1552–1612) went down in history as one of the greatest patrons of the arts and sciences.

During his 36-year reign, he amassed unimaginable treasures and riches behind the walls of Prague Castle. Only a chosen few were granted access to his legendary Kunstkammer, or cabinet of curiosities, whose contents are spread all over the world today.

The emperor had a penchant for all things occult. Magic, alchemy, astrology and the kabbalah were among his favourite pastimes.

https://theconversation.com/seven-metals-ringed-with-four-magical-inscriptions-what-other-secrets-does-the-alchemical-hand-bell-hold-204367

https://www.iflscience.com/is-a-mysterious-cipher-concealed-within-the-alchemical-hand-bell-69316

[Piney]

Bells were used to summon spirits in several cultures including the Shang and Tibetans. 

[Abramelin]

https://en.m.wikipedia.org/wiki/Language_of_the_birds