On Sunday, 23 February 2020 00:09:32 UTC, Graham. wrote:
My bellpush must me over 100 years old
https://photos.app.goo.gl/9NggL2CgEQje7ZnFA

and my doorbell must be 50

https://photos.app.goo.gl/wUbW7AVJNoZF5Uty5

But things are never quite what they seem.

https://www.youtube.com/watch?v=PIwZuu1fK-c

The really old ones are mechanical. A system of rigid steel wires and bellcranks. (What they were invented for)

The bells to summon the serfs were similar too.