Looks like a nice early example. I have a 1905ish Conn Double Bell in my collection. Serial Numbers give us a good date approximation, but it seems few companies still have really accurate data for the early years. The buying, selling, and name changes of various companies also complicate old data. If that is the edge of a case in one of your pics, that is a real find.
Jim
Jim Babbitt
1960s 4 valve and 1971 3 valve Besson New Standards (Denis Wick 6BM) for regular playing
1936 Conn 5 valve 30I Double Bell (Bach 6-1/2AL) General Purpose Back -Up
1924 Buescher 5 valve (the Denis Wick is close) and 1940 Holton 5 valve (Bach 6-1/2AL) Double Bells for kicks.
1860s OTS Saxhorn when history is required (the Denis Wick fits)