Very interesting thread!!!
Looking at old catalog, lunette Ideals were made only for black powder at first and then smokeless powder Ideals were marked "R".

Ideals were not only sold by the "Manufacture Francaise".
This is a (bad) copy of 1917 Rasetti´s catalog and they offered Ideals:


Also in old catalogs (1910) you can find that the "Manufacture Francaise" have representaives( is this the word?) around the word.


Martin