Another mystery car for you all. This metallic gold coupe with Alfa Romeo 166 rear lights appeared in the background of an old Quiller puzzle posted here on 19 December 2010 (Q656; https://www.autopuzzles.com/forum/2010-38/q656-solved-experimentbil-03-kipper/msg83643/#msg83643). This photo was taken at a custom car show somewhere in Sweden (not sure when or where).
The 'mystery' car looks to be possibly based around an older Japanese coupe (perhaps a Honda Prelude MK3, Nissan Silver 200SX, etc.?) but I still don't know what this car is, so if anyone has any ideas, please do share then here. Thank you, and sorry for the small photo.