Revolutionary War English Officer's or Gentleman's Ivory Handled Dinner Knife

Revolutionary War Officer's or Gentleman's Ivory Handled Dinner Knife.  Green dyed ivory.  Crack in ovory handle running the length of handle on one side.  Does not detract from piece and not uncommon. George Washington's main sword from the Revolution had a green dyed ivory handle.  9.75 in. in lenghth and 5.5 in blade, german silver collar.  Makers mark on blade needs further research