I think Newton also. But that makes the photo WW1 at the earliest & could even be as late as Depression-era.
Newtons were made before World War I. This one appears to have the cocking piece aperture rear sight.
I think it is somewhat of an assumption to conclude that the individuals pictured are gold miners just because one is holding a pan which might be used for panning gold. A Newton rifle was not an inexpensive item and would much more likely be found in the hands of a well-to-do hunter "roughing it" on a hunting trip. Binoculars are more suited to hunting than panning gold. The individual on the right would look perfectly at home in a three piece suit.
