Gemini IV for me this morning... puts a smile on my face very time. And heading out to pick up another Speedy this morning, a bit of a project that one, though it is in minty condition.
Not only is this watch great-looking, it's historically significant to the Omega brand. It even has its own, unique Calibre: the 8508. This is the prototype/predecessor of the Master, Coaxial Chronometer, and more recently, the Coaxial, Master Chronometer.