identify Hallmark Mark german, dutch

[bowl1]

Hello everyone in the forum.
Can someone tell me what kind of hallmark silver mark this is. It is located at the bottom of a vessel.
I’m interested in the silversmith/manufacturer. Probably from the 17th-18th century. Century or older??
I don’t know if the hallmark is upside down in the photo??
It probably comes from Germany, England, Netherlands??
I look forward to your help. Thanks

[bowl1]

brandy bowl, maternity bowl
diameter of the bowl without handle approx 10,5 cm
Height approx 5,5 cm

[bowl1]

The bowl, cup is uncleaned solid silver.

[Qrt.S]

Mind my asking, nice bowl, but what makes you believe it to be silver? Have you tested it? Is so, how did you test it? If I were you I would try to clean and polish it. Silver shall shine like the full moon! Cleaning might also reveal possible other marks!

[bowl1]

Hello
I'm looking for a result of the hallmark. What kind of brand is this? So you don't know the brand. Greetings....

[bowl1]

I'm interested in the time dating and delineation of the very fine decorative edge.