Indians For Guns

Hi - I am silversmith with an interest in old guns .. I have a friend who has his grandfather's "Hollis new century pigeon gun" - (12 guage, side by side) His recolection is , and the family stories go, that it had a silver pigeon's head on the front of the forend. He has asked me to make a replacement as the original has been lost for years. Does anyone have any information and or pictures of this or anything similar?