The Omega Speedmaster Moonwatch designed by NASA back in the '70s puts your puny Earthwatch to shame, because it's the first watch that's NASA certified for ALL space missions. Its anodized aluminum body can withstand temperatures from -148 to +260° Celsius, and its sassy red exterior is sure to impress any ladyaliens you meet on your travels. There's no confirmed price, but with a limited run of less than 2,000, we're betting it won't come cheap. If you can afford to go to space, you can afford one of these. [Josh Spear]
So if my arm is frozen solid, or burnt to a turd, I can just pry off the watch, dislodge the remains of my lost appendage, and check the time.
Lady aliens will likely have holographic Swatch-brand wrist-chronometers, which would put my puny life-saver watch to shame.