Need help identifying Tiffany maker's marks

[size=150]I have an old (I’m guessing >100 years old) piece marked Tiffany & Co. Sterling. It also has 2 additional marks, 1) an S inside a circle with wings on each side, and 2) the letters PP. Can you tell me what these marks mean and year of manufacture?[/size]
Tiffany mark PP.JPG
Tiffany mark S in wings.JPG

Did you ever discover anything on the “s with wings” hallmark? I have a piece with the same and found this post looking for information on it…

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Found it!
https://www.925-1000.com/ax_Shiebler.html

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And a more comprehensive piece about George W Shiebler & Co here.

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