Lampe Métal 6\100Amp

6\100Amp nickel based triode

French '6\100Amp' valve

6\100Amp nickel based triode made by France Compagnie des Lampes who traded as Lampe Métal.  Later the company became Mazradia and finally Mazda. Another example is pictured (centre, fifth row) at Udo Radtke's excellent site.