"The 199-year-old bike was originally made by Denis Johnson who registered a patent for the bike in 1818.
Johnson made 320 of the machines in 1819 with only 12 known to be in existence today.
It is believed by Mr Stockdale that this barn find is the oldest of the dozen as Johnston would number his bikes, but this particular machine was made pre-numbering strongly suggesting it was one of the first to be built."