what do these pictorial mark mean?

[kenjibell]

Previously I posted to ask a question about identifing hannmarks on the silverplate fork, John Gilbert, Birmigham.
In addition to identify marker's hallmark, I want to know what the pictorial marks stamped on the right side of initial mark do mean.
I suppose these mark represent anchor, symbol of Assay Office, Birmingham.
Could anyone advise me how to know these meaning of pictorial marks?

[silvermakersmarks]

They may not mean anything but the other way up they are the alchemical symbol for sulphur.

Phil

[kenjibell]

Dear Phi

Thank you. I did not find the alchemical symbol.

Kenjibell

They may not mean anything but the other way up they are the alchemical symbol for sulphur.

Phil

[oel]

https://en.m.wikipedia.org/wiki/Alchemical_symbol

Peter.

[kenjibell]

Dear Peter

Thank you for your information.

Kenjibell

https://en.m.wikipedia.org/wiki/Alchemical_symbol

Peter.