Each link is hallmarked with the crab hallmark and a very faint "flower" hallmark (not sure what that is, might be a design element?) but the makers mark is so tiny I have been having problems imaging it:
Bar Necklace Help French Tiny Makers Mark?
Re: Bar Necklace Help French Tiny Makers Mark?
:::: Whatever is in that makers mark seems to say "STERLING" but it might say "STERLÉ" with some writing after that, it's very confusing. :::::::::