VMC300 Toolholder question

[Proteus]

Don`t know if Coventry Toolholders is the correct one, but i do beleive to remember that name from another post somewhere here in the forum.
Took a Picture of it, and measured som of the Critical parts.
By the way i took a lokk at the link you gave me, but could not find anything even Close to it.

Maybe my Pictures could explain better, or hopefully somebody recognizes the holder...