Thank you for your response. In fact, it has happened to me, too, to notice similarities in patina and surfaces (sometimes even identical nummularii marks) between coins offered all together in the same auction or in chronologically close auctions and to think that they came not from the same collection, but from a single unknown find. I can think of several examples of this situation, but I had not noticed this hypothetical hoard dispersed by Gorny & Mosch.