I wouldn't know, I only collect groups to Indians where the WWII medals (most of them in most groups) are named. No medals to natives (of the British Isles) for me! Few DSOs though, as Indians weren't allowed those lofty ranks in any numbers until they became free. I do have several solid and researchable MC groups, though; most are shown on this forum, I think. Yet it is true in these corrupt dangerous days that any unnamed/unnumbered medals must have their research value questioned, as there are too many unscrupulous folks who will add anything to anything to make their profits. Provenance, provenance, provenance must remain the guide. However interesting unnamed/unnumbered items may be in numismatic terms, their research value is limited.