A brass French Almanac , "perpetual calendar", entirely engraved by hand.
Maximilien de Robespierre stands on the left by the column with underneath the words "Revolution Francaise".
On the right Louis the Sixteenth next to a column, with underneath the initials M. R. and the year 1789, the beginning of the French Revolution.
Under the day indication the monogram of the maker, A. T.
Extremely rare.