With what little we can see, I'm inclined toward the Speedmaster. But Buzz's fondness for his Rolex is well documented -- he wore it a lot during pre-Moon flight training.
You are your not confusing Buzz with Collins? Never seen Buzz wearing a Rolex. Collins wore a Rolex Turn-O-Graph at times during training for Apollo 11.
Here is a good one of Aldrin during Gemini 12 training.
CREDIT- NASA
Oops -- I confused Aldrin with Lovell. It's Lovell who loved his GMT. My bad 馃榿
Here's a hidden gem indeed, but it's kinda Mickey Mouse
Buzz Aldrin's official portrait as Commandant of the Air Force Test Pilot School
Looks like Skylab doesn't get much attention... Here's an image of LtCol Gerald Carr after spending 84 days in space onboard Skylab 4.
