"Treman" Quick-set Toolpost
A previously-unknown make of quick-set toolpost - the surviving parts being a pair of toolholders stamped ""Treman" and having dimensions of approximately 120 x 77 x 44 mm. The slot to take the cutting tool has a maximum capacity of 23 mm.
Dovetail angles appear to be around 70° and the height-adjuster screw is slightly tilted.
If you know more about this make, please do contact the writer.