Vintage Mexican Sterling Tailor's Open Top Thimble Marked Iguala Mexico

Description

This pretty thimble was used and does have light scratches and at least one tiny ding commensurate with age and use.
The markings are difficult to read and even more difficult to photograph.   It clearly says .925.  There is a maker's mark, but I cannot make it out.
A little over 1" tall and inside diameter at the bottom is 5/8".  I cannot find a mark for size and don't know how to determine it -- sorry.
Please examine photos.
Sold AS IS.