Renoir porcelain art plus other drawings

[pugwrangler]

Picked these up today. Cant find any info on the Renoir but it is of very high quality and in a sterling (835?) frame. Cant find much on the others either. Any help is appreciated, thanks!

 

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[Mackaydon]

Sterling would be .925.
Don..

 

[Mackaydon]

The Renoir reproduction painting you have is from a larger painting entitled "Madame Charpentier and her Children (1878). The backstory of the original can be found here: Articles - Impressionism: Renoir
Don........

 

[Lost&Found]

Is there a way of removing the tile from the frame without destroying it to check and see if there are any makers marks on the tile.