Identifying markings

[Maryellis0817]

I need help identifying the marking on this bracelet. It has 45 diamonds. Unsure if it's real or not. Thanks in advance for any help you might lend. Ty

 

[Evielution]

There is a book on assays and hallmarks by Bill Whetstone. I haven't read it but I hear he's the authority on that sort of thing

 

[Evielution]

http://university.langantiques.com/index.php/Category:Jewelry_Maker's_Marks
Another resource