Wow! I just called H&H in NY and had the most informative conversation I've ever had about a 114 year old gun!
Holland has the most comprehensive ledgers as well with superbly detailed info.
It says the gun was completed August 9th, 1899 at the factory. Apparently, it could still be a Scott gun but other evidence indicates that it was probably made by Holland. The fact that it is stocked "to the fences" indicates that it was probably made by Holland but is not absolute. The other reason is that it has only London proof marks on it which is a another indicator that it was made by Holland.
The gent from the NY gunroom informed me about all of the stock dimensions, weight, struck weight of the barrels, chokes, trigger pulls - great info indeed.
My hats off to them for providing such a great service for no cost at all. Clearly, they are interested in maintaining their heritage.