In pulling out my Jaeger 1903, i see a very similar front sight, barrel band, stock and buttplate, the barrel channel has the last three digits of the serial number given by Jaeger which is marked on the
barrel and receiver. What intrigued me about the Mauser on gunbroker, was the circle J proof mark on the bottom of the barrel. Sedgley used a circle S. I looked and my Jaeger does not have a proof mark.
So I wonder if there are examples of Jaeger's work with that circle J proof mark.