Hello
You have another one here :
https://www.ebay.fr/itm/LIV1938-Phot...EAAOSw1IhcNOOQ
Without old SFA number, but with a new, more chronological number, type specific. This new numbering was introduced for the purchases of new types, starting 1920 (don’t ask me for the precise date !).
The SFA numbering is a bit nightmarish and never full deciphered... Ranges of numbers were allocated for each manufacturer, and I suppose that the Spads built by SPAD had not exhausted the 1-999 initial range in 1918 and therefore numbers at the high end of that range were used for prototypes or small batches. No wonder if the bulk batches of Spad 7 or 13 are high above the 999, they belong to purchases at other manufacturers that SPAD (they were a dozen at least), or at SPAD with a batch too big for using the remaining numbers in the 1-999 range at the time of the purchase.
Regards
Jean