Well I thought I had seen every pic and knew every coachbuilt SS Jaguar an Jaguar car built but this one is completely knew so all I can do is list all the coachbuilders the tail light number plate light stuff on the back indicate a European car
"J Gurney Nutting" 1 only SS Jaguar never seen pic of car
"Maltby"
"Bernath" extremely unlikely
"Graber"
"Langenthal"
"Reinbolt & Christie"
"Secheron" I have only come across a note in the last few weeks they did a coachbuilt SS Jaguar
"Vanden Plas"
I look forward to finding out whose work it is and to even more finding out where this photo has come from
terry