Clock key taken from a Junghans clock. Used in combination with junghans clockwork B05. The key is approx. 1 13/16″ or 4,5 cm tall. The key has a square hole that’s is approx. 5/32″ or 0,4 cm wide. WE HAVE ANTIQUE KEYS AND NEW KEYS, WE SEND WHAT IS AVAILABLE MAY BE AN OLD KEY WITH SIGNS OF USE.