Wow. Thanks to Jan, Art, Robet Weil and the owner who allowed published photos to be shared with all of us.
I would suggest this is late Neihardt gun based on the delicate nature of the stock. One thing that stands out to me is pointed toe end of the buttstock, I have not seen a Neihardt this pointed. Very reminiscent of Johan ( John ) Rupp work which is more evidence to me that J Rupp probably apprenticed to Neihardt.
Love the whimsical nature of the carving designs.