I have this cup approx 9cm tall and 7cm wide, weighing 49.80g,marked T100 and LS on the bottom, wanting to know if its real silver, any information would be appreciated
More photos, please. 
https://www.reddit.com/r/Hallmarks/comments/1q446x4/is_this_a_silver_hallmark/
https://www.925-1000.com/forum/viewtopic.php?p=203247#p203247
Doubt it. But there is probably a reason you decided not to show the marks you are asking us to identify?
Do you mind my asking what that reason would be?
This Ebay seller thinks T100 means something approaching pure Cambodian silver
Antique GANESH Cambodian Pure Silver T100 Figurine ~ About 3.125" Tall 53g | eBay.
I see the discussion has been raised before in another place and note the predominance of thinking is the T100 is an Indian not Cambodian mark and in Cambodia it’s meaningless.
This Etsy seller also plumbs for purity:
My general view about pure silver is it is difficult to work with, expensive to stock pile and why would anybody selling pure silver not say so rather than using an obscure code?
LS is presumably the maker. The temptation is to ask the Ebay seller your question and specifically if he has had the silver tested and will he warrant the sale?
“Pure” is a very odd word. It’s sort of like vestal virgin – a comparative term rather than a definitive one.
So if you own it get it tested. If you are buying it based on these or other comments then buy for urtlity not bullion.
CRWW