These are mainly the Millenium Watch he completed with the help of Roger Smith and after he had signed the deal with Omega for use of the co-axial escapement (a smart move by Omega in my book). The pocket watches (of which I think 30 something were produced - not sure of the exact number) are generally held by private collectors or museums. I did hear of one for sale to the right client, but you are looking at £XXX,XXX at least. The last Millenium watch I saw come up for auction went for about £90k. I think now you would probably expect to pay more. See the post below, and especially the posting by Roger Smith on the Millenium Watch bought by a fellow Purist about 2 and a half years ago:
Admittedly, I prefer the pocket watches, but that is because they are so individual. That said, the Millenium Watch is the culmination of Daniels work, and I think 50 were made.
Hope this helps. Contact me by PM if you want to know about the last pocket watch that was for sale.
Regards
Andrew H