Ladies Pin "Lizzie" Marks show upturned 1(?), AS

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Sterling pin with name Lizzie on front, 1 3/4 " wide, 3/4" height. Marks appear to be an upside-down number 1. It seems to be inside the shape of a shield? Then there are letters A and S in conjoined diamond shaped markings with an M I think under the S. The following two marks I cannot understand or explain. I have researched for days and can not locate these marks anywhere. Can anyone identify?

[2209patrick]

Hello.
I believe those are British sterling hallmarks. Chester 1899.
What you say looks like an M under the AS mark is likely the lion passant.

The AS mark was used by Albert Sydenham.
Looks like an overstamp on a mark in a shield with the first letter T.
Possibly the case maker Thomas Russell & Son.
They entered a TR in a shield mark in Chester (June 18, 1884).

http://www.925-1000.com/british_marks.html

Pat.

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Thank you so much for the fast reply Sir Pat. This small pin is so delicate and I was sure that it was made for and worn by a woman in the 19th century. Lizzie Borden? It will remain a mystery. That's why I love this hobby. Thank you for you intelligence and assistance. Merry Christmas.