Featured Gien Rebus Plates, or The Importance of Checking the Marks

Bought these 2 Gien Rebus plates yesterday.




After I had seen these
https://www.chairish.com/product/4938750/antique-gien-france-pottery-rebus-plates-set-of-2
With this mark

Saying they're 19th century, and with an asking price of $225

After I had bought the plates, I found others with the same design as mine, but with this mark:

and saying they're from the 60s

And then I found this site:
https://www.libertys.com/gien.htm
And it turns out that the "19th" plates are actually from 1938-1960, mine are 1960-1971 and most of those being sold as plates from the 60s are 1971-1984

 

Fun plates, nonetheless!

 

Ditto-As a collector of antique graphics & signage,i love these plates & prob would've bought them at a fair price.They almost have a Tarot feel to them.
The thing that might've tipped me off re age-is how clean the transfer is-19th century transfer generally is a bit rougher IMHO.

 

What would be a fair price? I keep finding the 1971-1984 versions, with prices mostly in the $10-$35 range, but I'm not finding (many) actual 60s versions to know what these are worth/what a fair price would be if I decide to resell them one day.
I only found this one:
https://www.etsy.com/uk/listing/1066744726/rare-gien-france-french-vintage
with one 60s plate (and 2 70s/80s plates) with an asking price of $48.66
And I found a set of 6 on Ebay with a $150 asking price and 'best offer' accepted, that only has one image with the back of a plate., so I'm not sure if the other 5 are of the same age, or if it's a mix like the Etsy set.