Silver Beaker - Can you identify these marks?

[Alain]

My mother was given this beaker as a present at my birth, in 1959.
It came recently in my possesion. After cleaning the beaker these hallmarks at the bottom showed up.I am intrigued to find out more about this beaker.
It is 8 cm. high and with a diameter of 6,5 cm. at the top. At the bottom the diameter is 4,3 cm.
Thank you for your time !
Alain

[Alain]

I enhansed the earlier pictures.
The first mark looks like "2" and the third "GP" or "GR".
Information about any of these mark will be greatly appriciated!
Thank you,
Alain