16 ga shotgun

I recently acquired an old 16 ga shotgun from the late 1800s or early 1900s and can't seem to find any information on it. Maybe someone on this site can help me. It is a 16 ga double barrel manufactured by cambridge arms co it has hammers and replacable firing pins I am sure it was made in England for it has the queens crown as well as other English markings It looks very similar to the old remington stage coach shotgun The only thing wrong with it is one of the firing pins is missing other than that the gun is in really good shape.If anyone can lead me to some information on this gun it would be greatly appriciated. thanks,terry

Terry Thompson