Torpedoes, am I right?
I mean, they're essentially 19th-century steampunk guided missiles: all miniature steam engines (hellooo wet heaters), gleaming brass and mechanical control systems.
https://www.youtube.com/watch?v=epvEyiVby9A
Amazingly, these things have spend a productive 150-year career being worked on and refined, and still haven't gone out of style.
Best of all, they do this:
Share your love for the torpedo here.