Here are some signs, currently for sale on ebay by the current owners of the Little Tavern name, who are trying to get the chain back up and running. Great images.

From another seller, but just as amazing and rare:

Spectacular serigraph of the neon lights of the famous “Little Tavern” hamburger stand (located in Baltimore/Washington, D.C.) by well-known artist Clay Huffman (1957-2001). Huffman was born in Washington, D.C. and grew up in Maryland. He apprenticed at the Torpedo Factory Art Center (where he later had a studio), studied architecture at the Montgomery School of Architecture, and studied serigraphy with Marcel and Anne Laddon. Huffman combined his drafting/architectural skills with printmaking abilities to become an exceptional and highly regarded serigraph artist. His prints won numerous prizes in the 1980s and 1990s and were placed in prominent public and private collections worldwide. Specializing in depictions of unusual architectural sites, Huffman’s prints often provide images of cultural landmarks that are now extinct. Clearly influenced by the photorealists, Huffman’s prints compare favorably to the work of Robert Cottingham, Richard Estes, and Ralph Goings. Sadly, Huffman passed away at the age of 43 from complications from AIDS.

This print shows one of the famous “Little Tavern” hamburger stands, the last of which closed in 2008. A 30-color serigraph, it was produced in 1986. Entitled “Club LT all aglow,” it is numbered 52/100 and signed and dated lower right. It is in excellent condition (nicely framed), measuring 10 3/8″ x 17 1/2″ (image size).