A "Uniface" coin is one, as the name suggests, with a design only on one side, although the blank side may have "MODEL" inscribed on it.

Uniface coins are usually minted as a trial in very small quantities of maybe one to ten coins, and should never leave the mint.

Almost invariably, at least one or two seem to escape and end up in a coin collection somewhere.

A "Uniface" coin and a general circulation coin that has only been struck on one side, are not the same thing.

A genuine Uniface coin would be quite rare and possibly vary valuable.

This should be a pattern, with the word "ESSAI" in stead of the date?

If so, this is a good coin, struck in 1830:

- in gold: about 1200 dollars

- in tin: about 150 dollars

- in guilded cupper (uniface), about 120 dollars.

An official 10 francs-coin has never been struck during the reign of Louis Philippe I.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern -N-FA--. That is, seven letter words with 2nd letter N and 4th letter F and 5th letter A. In alphabetical order, they are:

uniface

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern --IF-C-. That is, seven letter words with 3rd letter I and 4th letter F and 6th letter C. In alphabetical order, they are:

edifice

orifice

uniface