No I have some of those also and there a carbon steel blade I believe as they rustAre the blades printed like these?View attachment 301227
The equivalent may be:
UK Silver Gillette
View attachment 301243
Image from Mr. Razor.
or
US Stainless
View attachment 301244
Image from Mr. Razor.
But I'm not positive as I've never come across your French Stainless blades.
Interesting find. Have you tried them, and if so how did they shave?
Yes the blades look similar to those so Your probably right and I have tryed them and they work surprising excellent probably the best blades I've used very smooth and last a long time like eight shaves would that analysis be similar to the us stainless and the uk silver also can you buy the others still