The whole issue stems around Dave Scott saying in his book that he wore a "Waltham watch (which was) of a similar type" to the speedmaster, not my brackets, this is taken from here...
http://chronomaddox.com/moonmovement.html.
Now this is going by Scott's own judgement of 'similar type'..does he mean that it had a round case? that it had three sub-dials?.. and if so that these sub-dials were in the same location as on the Speedmaster? Does he mean that the watch face was one continous colour?
I have not seen a 3 sub-dialled Waltham Watch with the sub-dials in the same location as on the Speedmaster, other than the 'panda' dial watches ...more importantly experts like Chuck Maddox didnt either... obviously that doesnt mean that they didnt exist.
There have been suggestions of another Waltham with 3 sub-dials, but the movement wasnt manufactured until 1974...so not Dave Scotts watch. There were however Waltham's with the Valjoux 7734 movement which had two sub-dials, and these were definitely manufactured before Apollo 15 and definitely had one colour (as well as the 'Panda') dials!
I wonder if Dave Scott could pick out 'the' watch if he had a bunch in front of him? After all even though I am highly interested in watches now... I couldnt identify a single watch I wore whilst I served 17 years in the forces until the Issued watch and strap that I got when I was entitled to grab one from the stores on promotion.