Gold world coin alloy and thickness database

[Marek K. Nowak]

Hi guys,

 

I've been looking for that for a while, and I can't find a good source of that information.

 

I'm looking for a database of thickness (not only diameter) of world coins (especially french), and their gold alloy.

 

I know that up to some date, french gold coins were alloy with silver, then some later dates (around 1830) look like some kind of copper/silver mix.

 

Also catalogs such as the krause only list AGW, not alloy, and neglect to list thickness as well.