The Norfolk pattern was Joseph Rodgers signature pattern back in the mid to late 1800's. They would stamp "NORFOLK KNIFE" into the wharncliffe master blades -- named no doubt for their primary factory and showroom at No 6 Norfolk Street, Sheffield (stamped into most of their knives). Their enormous and never since equaled 1851 Crystal Palace Exhibition Knife was called the Norfolk Knife -- and yes, it was of this same pattern, just ginormous with many incredibly ornamented blades with unbelievably *massive* magnificent carved pearl scales.
They had a wide range of Norfolk Knives patterns -- a number of 2, 3, and 4 bladed variations and even some large multiblade sportsman patterns. They *always* had rounded bolsters, a wharncliffe main blade, and a slightly larger bolster at the main blade end. They will also almost always have fully sunk joints with nail ease notches -- they were always very high quality knives.
Note the ones with Norfolk Knife stamped on their blades. These days, getting one of the original Rodgers Norfolk pattern knives has become nearly impossible.
Check out Mick's awesome Joseph Rodgers Norfolk whittler in ivory: