Q: Its the one with the commercial with JFK.

A: Here is the web page............

http://www.ernestjones.co.uk/webstore/de tail/R/6806996/

About .. $5,600

Edit.
I should think that it will be much cheaper in the US .. less tax to pay than in the UK.

Q: Now according to my book entitled 'Famous Firsts' published in 2003, the first watch to be worn on the moon was an Omega Speedmaster chronograph worn by NEIL ARMSTRONG.
However, according to Wikidepia, the first watch (the Omega Speedmaster) was worn by Aldrin Buzz, Which one was it??

A: Good Question a little bit of history i had never thought of Full records are not available on the present whereabouts of all the Speedmasters worn on the moon but the list set out below is believed to be the best record available.

Of special note, it is understood that Buzz Aldrin's watch was lost in transit in or about 1971 whilst en route to the Smithsonian Air and Space Museum whilst Buzz was attempting to loan the item for display. Its current whereabouts are not therefore known. It may well be the first watch worn on the moon. Buzz recounted in his autobiography that, during the EVA, Neil Armstrong left his own Speedmaster in the Lunar Module as a replacement for the in-cabin timer which had malfunctioned