Don, I have 3 non-Dagor Dagor's I use. 8 1/4" Kenro K. 10 3/4" Kenro K2. and Goerz Trigor 14". All are Swiss / Kern and say Goerz. All are in the late aluminum mounts. All produce fine results. I think Steve Hamley has a 9 1/2" like yours and I remember the name Argyle.