What an amazing lock, my initial reaction (or hope!) was it might be some sort of grande sonnerie which indicates when each of the different functions are being used with a different strike, but if only the follower spindle triggers the hammers, and they are all released together then that fantasy has gone out the window!

If the follower releases them onto the bell all at the same time then I guess it's got 5 hammers simply in order to produce a very particular combined sound. In the same way a chime whistle works with steam, steam released in one blast but having several different sized chambers produces a particular combined note overall. I would love it to be each hammer released independently by a different function though...

Can you tell us more on what happens with the different actions on it Brian?