Vintage French Punch Marked Saint Therese of Lisieux Blue Enamel Religious Pendant Medal Rose Back

Beautiful religious medal of St Therese of Lisieux in blue enamel- this medal measures approximately 5/8ths inches tall with the bail. This is a french made medal that is punch marked (hallmarked on the bail). The back of the pendant has a rose and that is why the medal does not lay flat in the first picture. This a silver colored medal- I don't know what the content of this metal is as it is hard for me to see the punch mark even under the loupe.