Help Identifying Hallmark 'N' and 'P' connected

I have search everywhere online to try to identify this jewelry set I was just given. On the back of each piece it is marked NP the letter are connected. Could anyone help me to identify this hallmark?

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Barton Wright’s Hallmarks of the Southwest shows a conjoined NP hallmark belonging to Navajo Nelson Piaso. It says Nelson Piaso is/was from Canyoncito, Alamo, or Albuquerque. When I look elsewhere on the internet for Nelson Piaso’s work, I’m finding a pretty wide variety of styles, so there could be more than one Navajo artist using a similar mark.

If this nice set was mine, I’d keep an eye on the internet for other Nelson Piaso work to surface, hoping to further clinch that possible ID. Hopefully someone else will have a more definitive answer for you.

I am happy to say I did in fact identify the marking on marks & library Worthpoints and it is Nelson Piaso thank your help!