I'm at home now with my button backmark book. It says all known Jacob Reeds Sons backmarks are post war.Thanks everyone for looking! The eagle is looking to the left not right, and the fluke or hook on the anchor is visible in front of the eagles left wing. Lastly the back is marked Jacob Reed's Sons Phila. This said I think it could be 1850's onward. I'm still not sure of the difference between the Jacob Reed 110 button or the Jacob Reed 115 button.