I would have serious doubts, too. Though the wear look quite natural, I don't like the color of the coin and - especially - the black areas around "NAPOLEON" and under the effigy. Looks like artificially blackened (antiqued) coin. I might be wrong though.
What about the weight and dimensions?
Для всього свій час, і година своя кожній справі під небом
Looks alright. The coin has been cleaned and the blackened areas are just the spots that were harder to clean, such as between letters.
If you like coins, medals and tokens with ship motives follow my new instagram account with regular updates @numisnautiker
From time to time I sell some coins on Ebay make sure to follow me @apuking on Ebay.
Sorry about the late reply, I have had a busy week.
My main worry about the coin is the small mark just under Napoleons nose. This mark slightly protrudes from the surface of the coin, I have no idea what could have made this mark. Could it be a die error?