I have an old silver tray with markings on the back:
I think I understand from the internet that the "Sterling 925/1000 Fine" was a standard way of marking silver, but I am curious about the three stamps below that line.
Can anyone enlighten me?
Edited to add: Note also what appears to be scratched on numbers below the mark. 134-17. Some sort of serial number?

I think I understand from the internet that the "Sterling 925/1000 Fine" was a standard way of marking silver, but I am curious about the three stamps below that line.
Can anyone enlighten me?
Edited to add: Note also what appears to be scratched on numbers below the mark. 134-17. Some sort of serial number?
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