No. 171, in the photo
We received this photo from a Dutch Citroën enthusiast. He took the photo when he bought another Citroën in Picardy in 2011. So no. 171 still exists!
171
No. 171 drives in Picardy
From No. 171 we know that he drives around in Picardy. He is listed on Jeroen Cats' site with a photo. Our flying reporter at the ICCCR 2012 has contacted the owner, soon more photos and info.