There's an interesting relationship between bells and cannons.

It's not hard to imagine why they'd be made in the same foundries of similar metal. Yet, in a sense, they have opposite roles. The former is pro-social in that it signals events to the community equally over large distances. The latter is anti-social in that it's used to destroy the lives and property of others. There's something poetic about the fact that the two are given birth at the same place. Yinyang.

From Wikipedia's Bell metal article:
In Java, ... Bell metal is particularly prized for its excellent sonorous qualities, also found in bell metal cannons which produce a distinct, loud ring when fired....

The Spanish and Portuguese were equally astounded to find their European bronze cannon offerings to the Javanese rejected as inferior in quality, as they rightly were.