Cosmo III 1677 Silver Coin?

Piastra of the Grand DUchy of Tuscany: https://en.numista.com/catalogue/pieces96407.html

The translation of the obverse legend is "Cosimo III, by the grace of God, 6th Grand DUke of Etruria."

The Medici dukes used Etruria in place of Tuscany for the name of the Grand Duchy. The VI at the end of the legend refers to Cosimo being the sixth to hold the title of Grand Duke. As best I can tell, this is a peculiarity of Italian city-states not seen elsewhere.

I have one of these (1678 I think). It looks OK to me, just worn. That sounds a fair price for the condition .... probably I paid 4 times more, from a reputable auction house.

Ok. So I bought the coin; when I went back to the shop it was discounted - items in these shops are discounted after 60, 90, 120 days; this one was in a case, hanging out of sight since August, so I paid far less than $70. It weights 31.6 and its 45 mm d. Based on comparables I found online, I am going to say this coin is authentic and probably not worth much, but well worth what I paid. Yes, no? Either way, I'm happy with it.

Thank you! I am sorry, for some reason I thought it was 1700.

Thanks, @t360... I have posted four other finds on these forums - one bad buy which I didn't run through the forum first - and three I am very happy with. I am not a coin collector, but really enjoy finding interesting, historic coins when I can!