this is #7 of a set only wear is tarnish

We just got this piece and started to do some research on it and wanted to know if there is a way to determine if it is a real Herculaneum piece.

Any help and possible appraisals would be appreciated!

Mint condition with carry case and instruction manaul.

We just acquired this piece and wanted to know if anyone would recognize it and the signature on the bottom of "A.S."

Thank you.

 looks like lion L B unicorn mark on back of tray

The item is part of a family estate. Unfortunately, no one knows when, where, or for how much this was purchased. The lid of the tea pot is inexpertly repaired, all other elements in quite good shape with minimal wear.

I've tried to compensate for my less than helpful description with good pictures, below.

I'm not opposed to selling this item, but I don't know enough to ethically set or correctly evaluate an offer. Not a good position to be in, so I'm inclined to hold off for more information.

Any idea of the provenance or value of this set? Any guidance would be appreciated.