This diagonal was sold to me used. I was told it is an "Antares" but there are no markings on it. Includes 2" to 1.25" adapter. Note this diagonal is the type that screws onto the threaded back of an SCT.
There is an area of very light scratches on the mirror surface, cause unknown, but impossible to discern when in use. I like to keep my stuff immaculate, perhaps you might want this as a diagonal to use during star parties, etc. I will sell it for $45.00 including shipping in CONUS. Money order or PayPal(add 2.9% + 30¢)