Height adjustable birch and brass partner desk 1960s

Unusual partner desk from the 1960s. The birch wooden desk has 2 drawers on each side and is height adjustable due to a clever system. Nice details are the dovetail joints, the originally shades legs and brass details. Remains in good condition with some traces of use to the top due to age. The desk is signed underneath but unfortunately we cannot trace any designer or manufacturer.