Currently this watch is part of the exhibition “Destination Moon” at the Heinz History Center in Pittsburgh. There’s a nice bio of Michael Collins, the watch’s owner and Apollo 11 command module pilot here: https://www.space.com/16971-michael-collins-apollo-11.html
It would be nice to see if Michael Collin swore the same Omega Speedmaster chronograph in training... on a JB Champion steel mesh bracelet ..