I have a 240 mm Sironar that is probably from the same vintage. It is big and in a Compur (modern) shutter that is a #3. It covers 8x10 also and until I got a 305 mm G-Claron and a 210 mm G-Claron that is all I had to use for 8x10. Mine is marked for 240 mm and for 600 I think. Tomorrow I will check and see what it says and let you know. As far as something other than a plain Sironar, I don't think so.