Marque ND Phot. Appears in the Paris directory from 1903*. About 1920, this firm was acquired by the printer Émile Crété. I haven't seen any cards with the logo X Phot which appears in his 1921 entry. Crété also acquired the firm of Lévy Fils et Cie, and the new combined company was known as Lévy et Neurdein Réunis. In 1932, Lévy et Neurdein Réunis company was acquired by the Compagnie des Arts Photomécaniques (CAP).
* Actually appears earlier in the photography section, before there was a section for postcards. The advert for 1898 also includes the marque de fabrique X as well as ND.
from TOME 2, LE TARIF DES DROITS D'OCTROI DE PARIS ... 1907
from Annuaire du Commerce Didot-Bottin 1921 Paris Tome II
from Annuaire du Commerce Didot-Bottin 1925 Paris
ND PHOT S66
ND PHOT S86 verso
ND PHOT 254
ND PHOT 254 rev
