Altieri made a gig bag for my 1941 Holton 5 valve double bell. It is very nice.
Also, have a Conn similar to, but slightly older than your 1917, with an original case in pretty rough condition.
Will try to get a picture of the case and link it.
I receive frequent complaints about the size of my euph herd.
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)