I am trying to research a J. Nowotny double rifle that appears to be .450 caliber. It has some interesting markings and I was hoping someone might know what they mean. First, there is a medallion on top of the buttstock with a Crown over N & E superimposed on each other. Any thoughts on meaning of the markings, or value of the rifle would be greatly appreciated.

Second, is a series of letter on a plate along the right side of the stock near the buttplate.

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