According to my info this is a Polish Spad 51 (Jupiter) not a 52. The 52 had a Le Rhone engine. The Spads 29, 34, and 52 are broadly similar aeroplanes and Fonck’s 29 had twin wing struts whilst other 29’s had the more common I struts and a smaller fin whilst the 52 had a larger fin. This being about the only distinguishing area. So yes the original picture is a 29.
John

John thanks for your confirmation!
Martin