Silver marks on a beaker (admin edit)

[jonfl]

Could you tell me where the brands of this glass are from?

a greeting

[jonfl]

It is a normal glass, not precipitates. The mark is an M inside a flag and a round dot.

Nobody knows anything about her.

a greeting

[jonfl]

It's not a beaker, it's a normal avso with a gold border.
The brand is an M inside a flag