The Clue of the Hissing Serpent is Volume 53 in the original The Hardy Boys Mystery Stories published by Grosset and Dunlap.
The Hardy brothers and Chet meet a wealthy balloonist named Albert Krassner, who is in possession of the Ruby King, a valuable life-sized chess piece that is the prize for a chess tournament. The boys soon learn that a gang wants to steal the Ruby King. Then the Ruby King mysteriously disappears from the Krassner safe, sending the Hardy Boys to Hong Kong. There they capture the gang and find the Ruby King.
BYOP