Hello,
Currently on ebay is a photoo f an Aviatik aircraft with a Salmson engine at:
https://www.ebay.fr/itm/AVIATION-Car...4AAOSw4A1fvmtc
It appears to be the Aviatik P 19 in its final form, or so I assume given the number on the fuselage - a racing number pesumably. In any event the tail is different from that shown on the P 19 image shown in the link in the fourth post of this thread.
Regards,
Clint