One bowl is marked as Mexico Plateador S.A P91. The weight is 219 grams. It shows light wear . Please note, these pieces were hard for me to photograph due to flash. Most of the 'Hazing" seen is not scratches but from my attempt to try to wipe off fingerprints with a soft cloth. They have minor surface scratches but not like my photos may imply. I tried to include some photos without flash so you could see the difference.
The other clam shell style is footed and is unmarked.
However it has been tested numerous times by numerous jewelers who have confirmed it is genuine sterling. It is gleaming and when you compare it against the other piece, you can note the difference.
It alone weighs 106 grams and is in excellent condition with very faint signs of tarnish, Minor hair line scratches to both as one should expect from antique items. (As mentioned above)
The bowl measures approx. : 6 x 6 x almost 2" and the tray/dish measures approx. : 6.25" x 4.25" with a depth of approx 1.75"