Hello Jamie,
Here is my example of the partial "N" (Piedmont 150), plus a Lundgren without the partial "N" (tougher Piedmont 350). Whether it is a variation or not is for others to debate, but since I have one..........I'm calling it a variation along the same lines of the partial "S" in Nodgrass. The "N" stroke has not worn away, it simply is not there. Jamie actually pointed-out the partial "N" Lundgren in a prior thread a few years back and ever since then I've been looking for another. I've found one more (in an eBay auction about a year ago) but past on pulling the snipe trigger.
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Lovely Day...