The diamond shape stamp is commen amongst French makers marks,it would worry me that the other hallmarks dont appear to make much sense.With gold it always makes sense.There are density tests and so on to determine gold or not , id probably take it to a jeweler and ask.
Im thinking 84gms (i think thats what the scales said) is almost 3 ounces , is the scale set to grams or troy ? It would seem heavy enough to be gold.
The more i just look at it , its screaming its gold.Better than i have been fooled though.Its the hallmarks that are suspicious.An old test for gold is to clean the piece well and when its cleaned and fragrance free of any cleaning solvents , just use a soft cloth.
When you are sure its clean rub the bracelet between your fingers for a minute or two.If you detect a smell of any kind on your fingers its not gold , if theres absolutely no smell,could very well be gold or at least plated.Im leaning towards gold on looks and weight.
If its not gold you must consider what else it could be , gold is twice as heavy as brass.
If thats gold its a wonderful find,i cant get past those hallmarks though,they should refer to a purity somewhere.