The online calculator I found only goes back to the middle of 1901, so 12,000 FF back then is worth about 47,110 Euros today. Going back earlier than 1901 woul

The online calculator I found only goes back to the middle of 1901, so 12,000 FF back then is worth about 47,110 Euros today. Going back earlier than 1901 would require some interesting historic research. But a guess would be that it would have been serious money.