How to find the actual capture date/time of a photo?

I have a photo that seems to have a corrupted capture date, as it is set to a later date (seems like an import date or something). 

This date is seen in grid view, in loupe view, in metadata in edit metadada, I've checked with exteral exif reader and all agree on this "newer" date.

However LR correctly sorts this image according to it's actual capture date. (I happe to rouhly know when this picture was taken).

How do I extract this actual date from LR?

It's the picture with "Green box" in my screenshot.