Was Kaloterna 'disappeared'?

Egyptian mummy mask excavated at Saqqara

Paul Barford has written on the Kaloterna collection that once (allegedly) possessed the Egyptian mummy mask discovered at Saqqara and for the time being in the St Louis Art Museum (SLAM). He raises an uncomfortable possibility for the curatorial team at SLAM:

One might quite legitimately ask, whether there is a possibility that Kaloterna was 'disappeared' by the Socialist Federal Republic of Yugoslavia's State Security Apparatus for political reasons.

I am sure that SLAM officials would not wish to be seen to have gained an object that could have been released back onto the market by such a means.

Did the SLAM rigorous due diligence process explore (and eliminate) this possibility?

My own position is that I think that it is likely that the Kaloterna collection is fictional. No authenticated documentation has yet been produced through the due diligence process to show that it existed.

Is the Kaloterna collection fictional?

Egyptian mummy mask
reported to have formed part of
"the Kaloterna collection"

Just over a month ago I raised some questions about the Kaloterna collection. Nobody has pointed me in the direction of other objects from this collection. Could this collection be fictional?

What is the authenticated evidence that Zuzi Jelinek acquired this mask from the Kaloterna collection? Did this take place in the early 1960s? Where was Jelinek living when the acquisition was made? Does Jelinek have any (up to now overlooked) record among her papers?

If the Kaloterna collection did not exist, where does it leave the due diligence research by curatorial staff at the St Louis Art Museum? Would it mean that the mask was acquired "improperly" (to borrow a word from SLAM's Director)?

The Kaloterna Collection: fact or fiction?

Around 1962 the Egyptian mummy mask excavated at Saqqara, and now in the St Louis Art Museum, is reported to have entered the Kaloterna collection. What is this collection? What else formed part of the collection? Where was the collection located?

When did the owner of the Kaloterna collection sell the mask to a Croatian private collector? And how did the mask move?

Do readers of LM know of other documented items from the Kaloterna collection?

The Director, curators, and Trustees of SLAM need to explain the Kaloterna collection, not least because it coincides with a period when the mask is recorded as being in Cairo.

What if the Kaloterna collection is a fictional collection?