This is a beautiful and EXTREMELY RARE,
Boston and Sandwich Company, SL 15, Lacy Period,
Pressed Glass, Clambroth Open Salt!
These are so very rare to begin with 
and hardly ever seen in CLAMBROTH!
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It is
Approx. 181-191 Yrs Old!
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It measures: 
3.0" long x 1.75 wide x 1.5/8" high
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It is in great condition for almost 200 year old glass! 
There are what appears to be, either fibers, straw marks or very thin striations, ONLY on the inside bottom and up the sides a bit, in a cpl places. It is NOT through the glass and most can't be felt with the fingernail, leading me to believe that it may be a combo of the things I mentioned above. They can't be seen/felt from the other sides of where they are on the inside. Temperature changes alone, over that many years can cause striations in glass that are never fully through the thickness, but again, as I said they also appear more like fibers and straw marks, of which there are 2 obvious, diagonal straw marks on the inside bottom, so again, it's probably a combo of things. I tried to show this all in pics 6, 7, 8.
The other thing to note is that one side bottom edge has TOO much glass. 
Look at the last pic, which explains it visually and you will see for yourself what I am talking about. 
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Please see all pics, as they are part of the description.
I try to describe my items exactly as they are and will never leave out important info, but being a human, I could make a mistake and leave something out, so if you have any questions, please just ask. :)
I am happy to combine shipping as long as items can be safely shipped together.
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I offer 2 business day shipping, but most times I ship within 24 hours-depending on the day of the week. But even on weekends, I pack and buy/print the shipping label with the next business date of shipping, so it is all ready to go.
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I also ship INTERNATIONALLY, but only through ebay's Global Shipping Program.
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Thanks for looking!