My obsession doesn't stop at watches. I have 24-hour clocks too.
This World Time Clock came with a 12-hour movement but today I replaced that with a 24-hour movement so it makes much more sense now.
Kitchen Wall Clock
Russian Aircraft Clock on a home-made laser-cut acrylic stand
Bulova Quartz (with pendulum removed because it chews through batteries)
(Yes, that's a tellurian orrery in the background.)
The following are clocks I've made myself.
Arduino-driven DAC VU Meter Clock (Mk.1)
TTL Binary Clock Prototype (showing 13:23:48)
Arduino-driven Binary Clock Prototype (showing 13:41:13)
So what 24-hour clocks do you have that you'd like to show us?