[Researcher]

Long before the .410-bore was introduced, the Quality EH and NH had been dropped. From the introduction of the Parker Bros hammerless double through about 1900, the 10-gauge carried a $5 premium over the smaller gauges in grade 1 and 2. By the catalog (circa 1901 or 2) that introduces the Parker Bros. automatic ejector the Quality EH and NH were gone and the 10-gauges were the same price as the smaller gauges in the grade 1 and 2. From the catalog circa 1900 --

Quality E.H. Blue Ink Catalog.jpeg

Quality G.H. Blue Ink Catalog.jpeg

Quality N.H. Blue Ink Catalog.jpg

Quality P.H. Blue Ink Catalog.jpeg

From the catalog circa 1901 or 2 --

Quality G.H. Ejector Catalog.jpeg

Quality P.H. Ejector Catalog.jpeg