I agree it looks a lot like Rentschke's work . Both the style of scroll and the gold work (Not that he is exclusive to that style in all of his work, he certainly isn't.)

Are the gold ovals on the bottom of the trigger guards left open (un-engraved) ?. Just wondering.
Sometimes that's done with the idea of a future presentation in mind. A specific time/date/name to be engraved when determined by historical events.

Very nice find!