Antique German fox shakers' marks?

[Wolfrott]

I have this pair of antique German silver fox salt & pepper shakers that I'd like help on.

I am certain the marks mean German silver, not plate or .925 sterling, however do these marks signify the year? Or a particular origin?

This is my first time investigating German silver, if that helps any. Only one of the foxes has marks on the undeside of its foot; bought as a pair from an estate.

[dognose]

What happened to the images?

Trev.