Vintage Crystal Glass Snail Figurine, Snail Paperweight (DE-A101)
 
 
This slinky snail is super cute. He is quite heavy and would look great as a paperweight on a sophisticated desk, or would look brilliant displayed on a lighted shelf. 
I do not know the brand although I've seen similar marked viking or stueben. There are very faint marks on the bottom that are impossible to see. There is also a pressed square stamping in the end of the tail but that could just be a sort of pontil mark.

Condition - Good, One of his eye stalks is broken. He may need a little bath. There are interior bubbles withing the glass. 
He is approximately 4" long.