Here is a bit of fun on the subject of Nieuport types. I believe that Guynemer was assigned 1530 & 1531?
Nieuport PagesAnd some References:
Aircraft Designations (French) submitted by P. Grosz, Cross & Cockade USA Vol.25, #2, Pp.112-115, 1984.
French aircraft of the first World War by Davilla & Soltan, Flying Machines Press, 1997.
Markings of the Lafayette Escadrille by B. Alexander, W. Michigan IPMS News 1976.
Nieuport 17 by C.F. Andrews, Profile #49, Profile Pub. 1965.
Nieuport Aces By N. Franks, Osprey, Aircraft of the Aces #33, 2000.
Nieuport Fighters of WWI by J.M.Bruce, Osprey, Vintage Warbirds #10, 1993.
Nieuport Fighters Vol 1 by J.M. Bruce, Windsock Datafile Special, Albatros Pub. 1993.
Nieuport Fighters Vol 2 by R. Rimell, Windsock Datafile Special, Albatros Pub. 1994.
Nieuport Vee Strutters by S. Nelsen, Cross & Cockade USA, Vol.7, #3,Pp.237-253. 1966.
Nieuport Vee Str. Errata & Addenda, Cross & Cockade USA Vol.12,#2, Pp.189-190. 1971.
Pere’ Dorme- The Quiet Stork by D. Reeves, IPMS Journal date unknown.