I assume the O1091 is on the box. It would be the model number for this pistol. Colt makes a bunch of 1911s and they all can't be called that. AFAIK Colt gives all the variants their own O frame number.
Moving to the Colt forum, where some of the Colt diehards might be able to ID it better. I suspect it was simply one of a bajillion different limited-run pistols the Custom Shop thought up during the 1990's and sold through select distributors. And yes, the "01091" is simply Colt's SKU for this item.
Thanks for the welcome guys. I took it to the range today and was verrrrry happy with it. It shoots better than I do. lol. Also a gentlemen at the range said it was a Lew Horton Colt Delta 10mm. And that I shouldn't shoot it to often. He said their hard to come by, and he offered me $650.00 for it. I told him maybe later but not right now since I just got it. Is there any truth to what he told me?
I don't know anything about production dates or numbers, but the DELTA 10 has the same relationship to the Delta Elite that the M1991A1 has to the Government Model; a no frills, matte-finished gun of G.I. configuration.
I'm happy as a pig in the mud. I just got off the phone with Bob from Lew Horton Dis. He ran the serial number threw thier computer. And said I should stick it back in the safe, and hold on to it. The serial came back as a Lew Horton 98 10mm. Only 100 were made. But I bought it to shoot, So I will until I can find another 10mm to take it place. Man this made my day. I have one of only 100 ever made. WOW. And I would also like to thank everyone here for thier input.