No way to tell for sure. The handles are ebony and the basic profile, with the full finger guard, aluminum "bolster," and rivited handles means they're most likely post war; especially if you consider condition. They don't show much use, haven't been sharpened very much, the profiles are still intact, the handles aren't cracking but are very, very dirty. They appear to have been stored dirty.
Because there's no marking on the handle, my guess is that they're either not very old or were made OEM by one of the major Sabatier companies for an importer like Cuisine de France. An awful lot of K-Sabatiers came into the country that way... But so did Lions, "V"s, and some others. I don't know enough about your particular knife to offer an opinion.
It really doesn't matter though. Clean the gunk out of the rivet holes with steam and brushing, oil the heck out of the handles, shine up the blades with baking soda and a Scotch-Brite, sharpen it well, and use it joyously -- that's what it's for.