I agree with Mike. I am a Wheelman and have had a lot of exposure to bikes from this era. Since the date quoted is 1856, that would put it in the era of the hobby horse. I have never seen a hobby horse with pedals and a chain. They were all chainless, crankless devices that were propelled by your feet pushing you along. Even the later boneshakers and hi wheels had no chains. The chain driven bikes did not really come into their own until the late 1880s and even then they were crude. I have seen contraptions like this one and they were usually built by hobbiest just for fun. The wood is to clean and new looking and some of the parts may have been refabed or taken from another period bike but I can guarantee you this is not a bike that was made in 1856 - 66 - 76 and I can go on but it will just bore you.
Ray Homiski
Elizabeth, NJ