[Researcher]

The NH-Grade was the 10-gauge equivalent of the PH-Grade in 12-, 14-, 16- and 20-guages. They were both Quality 1 guns. Essentially in the lower Qualities, 1 and 2 a 10-gauge gun cost $5 more than the same Quality in the smaller gauges, hence the NH equal to a PH grade, and the EH equal to the GH grade.



This is what a nice NH-Grade should look like --