but if you want to be sure you have the correct speedy that was actually used on the first moonwalk you'll need to research which model Buzz Aldrin was issued with.
i think it was a 105.012, the first with the curved lugs, but as it was stolen whilst en route to the Smithsonian from NASA, it could be difficult to find out.
in my opinion, the modern renditions of the historic speedmasters are rarely worth waiting for.
G.