Is the Neumann & Cie by Neumann freres of Liege, Belgium? With the stippling, punch point, fleck, the sideclips and frame similarities to a Sauer, it looks Germanic and there was a Franz Neumann of Suhl. Does the left eagle of the doubled headed eagle have a sword in its claws or can you tell what is in the shield? For now I would guess it to be post 1898 and pre-WWI.

Kind Regards,

Raimey
rse