Added to the DB. Odd how the HSTN M bounces between two SKUs - Dann
Dann I think the one SKU is the "split frame" like the Kylian Mbappe edition OO9242-XX52 and the others are the "non split frame" OO9464-XX52.
Then of course there is the HSTN "S" OO9464-XX50 which was a smaller version of the OO9464-XX52 with 125mm temple length and 50mm wide lenses instead of 131mm temple length and 52mm lens "M" size.
Overall they really made in convoluted.