I was really excited one day when I found a local craigslist ad for Cousances cookware - I believe it was a #18 and #16 saucepot plus a skillet. You can see by the seller's photos that the small pot is "brand new" and never used despite being over 60 years old! The high resolution version of this photo shows that the sticker says "Cousances fonte émailée" (enamelled cast iron) and reads "Anno 1553" above a shield logo.
The knobs on the lids also read Cousances, which would probably help to date it and differentiate it from this piece I happily found in the past, which I suspect may be a bit older.
Alas, I hesitated and it went to another home. I really didn't need the skillet, and the list price was $85 for the set of three, which led me to pause and think. Since I love Le Creuset cookware so much, it would have been nice to have a cute little set in this timeless colour, with all the history I seem to enjoy learning about!