I too have a copy of the H&H ledger page for my double 500/450 3-1/4" sidelock which was made in 1905 and shows my number as 1908x.

If this one, serial number 19037, was made in 1898, that means H&H only made about 50 rifles in the intervening seven years.

Mine is the plainer version, and was ordered from India by an Englishman, then brought to the US by Jim Bell of Bell Extrusion Laboratories, Ltd. in the 1970's when he served in the Peace Corps there and picked up several old doubles.

It also has splendid case coloring, but I think that is because it was refreshed by H&H at Jim's request. He also had Al Biesen install a LH butt stock, so it is in fantastic condition. Unfortunately, it is in storage in the US and I cannot show pictures. Yes, it shoots well, too.