Hello,
Currently on ebay is a photo of an Italian Bleriot XI at :
https://www.ebay.it/itm/Foto-Fotogra...kAAOSwGzdfF8wQ
The serial looks very like Bl.230, however Gentilli and Varriale have serial number 230 as a Caproni Ca.18. So is the number shown on the aircraft actually Bl.250 or perhaps Bl.230 is a french serial?
Regards,
Clint