How Difficult Is It To Ring A Doorbell?

[Flying10uk]

Here is my "mechanical doorbell". I found these bells in an antique shop some years ago and it was just the bells and springs being sold. They had been removed from an old house as "no longer required" during modernisation, according to the dealer. There was a bit of "fiddling about" required with the connecting linkage so that both bells would both ring together.