Hello,
Currently on ebay is a photo of a Farman with the serial F.1.
https://www.ebay.com/itm/31609356682...Bk9SR8je6o-EZQ
I'm uncertain of the type of Farman seen given both that early Farman's are hard to differentiate and the early SFA numbering system seemingly went through a number of variations.
Regards,
Clint