There's a photo of Felix too, that seems to have been lost in cyberspace, so I have re-sent it to the very kind soul that is Helen.
I have somewhere the photos taken at the time of the Nazi inquiry, and the one of Gertrude is very like the Felix that I have sent to Helen -- sharp-nosed and fine-featured. I thought that this Gertrude might be of interest in comparing to photos of AA in old-age.
The photo of Maria Juliana was taken by the court investigator in the late twenties, at the suggestion of the family. It was their opinion that Maria Juliana and Franziska were very much alike, though MJ was several years younger.
The truck photo was sent by Fiat in answer to a request regarding the sorts of trucks shipped to Russia at the time in question. I believe that this is a model from the mid-teens. I have always been under the impression that the truck had stake-bed sides. Fiat did not sell trucks with sides at this time, so if the truck had them, they were an after-market addition. I don't know if the impression of sides on the truck is correct or not, though -- or if it's something that I just assumed or picked up subliminally from watching various recreations -- I can't recall actually reading such specifics about the truck. So, right now, I can't say for sure that there were sides...