I found a vase on the market today with tin crackle - the type that is usually associated with Leerdam; only this time it had an original label.
Red and silver foil, three letters M surrounding a circle, in the middle the word TRIER. sorry no pic.
Anyone seen the MMM label before? I could not find a glass industry in Trier (a.k.a. Trèves) so it might be a distributor...