Considering however that the makers Schubert and Werth were exhibiting in the Exhibition of the German Empire in Chicago 1893 I hope to save it from the bin. The original version of this door closer was introduced around 1902, having a single valve to the front and no valve on the top, to the right as can be seen in my photographs.
As you will see this antique door closer would not look out of place in the Reichstag Building or even the Winter Place.
For those interested the inscription reads: Schubert & Werth, Berlin, Door Check/Door Closer, Factory.
Of course the outside of this door closer is the easy part to the repair/renovation, it is the mechanicals that are causing the problems as described above.
You can see it working at our You Tube site, not the most fitting of doors to have the ADLER mounted to but it can at least be shown to be working.