Greece - Were the awards of Georgios Papadopoulos ever auctioned off?

[landsknechte]

I'm trying to prove or disprove a bit of an odd story...

 

I picked up a German decoration (Order of Merit of the Federal Republic of Germany, Great Cross).  The seller stated that it was "Discovered in Athens, Greece and likely was presented to a late former Prime Minister whose estate the seller handled some time back."    I cross referenced a database of Greek Prime Ministers and Verdienstorden recipients, and Georgios Papadopoulos was the lone Großes Verdienstkreuz match.  He was awarded it in 1960 while he was a humble diplomat.  The rest were awarded higher grades of  the award, once they had achieved a higher office.  As best I can tell, the award itself looks like one from the right era. 

 

Does anyone know if there was an auction where something like this might have been sold off at some point?  Perhaps his widow selling off some of the clutter?  Ultimately I bought it to complete a display for someone else entirely, so it's no great loss should it prove to be anonymous.  However it's got a distinctive chip in the enamel that might show up in a catalog photo, so there might be a possibility.

 

As an American with no knowledge of the Greek language and a similarly named American political figure clogging up the works, my search engine efforts have been fruitless thus far.  Anyone know where I should look next?