I think this mark of 835 S JF is german silver made or wholesaled by Johann Franz Jr. of Schwabisch Germany -from 1892 to 1988.
The 835 stamp is clear but the large S and the bottom of the J are difficult to see as the letters on the bottom right hand side have been cut off, by the awkward placement of the mark on the rim.
As you can see in the picture the large "unique" F at the end of the stamp allows for the bottom of the J to fill the space between the S and F.
This is very similar to Trev's post of the JF intertwined letters of J. Franz Jr.
Hope someone can help me finally identify my compact!!
Happy New Year from Canada.
Lynne