american silver marks

Can anyone help identify a piece of American? Jewellery.
It is a large solid silver dragonfly with sterling impressed on the back next to this is the hallmark, but it is very small, I have tried to magnify it but its still blurred. There are 5 marks the 1st looks like a T and an s then 925 then a and w… could anyone give an idea of age of the piece please
d stamp.jpg
dragonfly.jpg