19 Place St Pierre (1903), 5 Rue de Steinkerque, (1907) Paris.
Saint-Just appears in the 1903 to 1914 Bottins but not in the 1921 edition. The stock must have passed to Comptoir Parisien ... as card Gloria 263/2 (qv) has a scarely concealed marking for AS 135 or 235.
Saint-Just was also the publisher of LEDA cards, as printed on the address side of some but not all of them.