When Thomas Jefferson arrived in Paris, Louis XVI was still a 31-year old king and not a 63-year old Michael Lonsdale.
Thomas buys items from Parisian merchants who use the metric system of measure over a decade before the adoption of metric units in France.
Jefferson was in Paris from 1785 to 1789, but is depicted as witnessing the Mongolfier balloon ascent (with sheep, duck, and rooster) which took place in 1783.