![Image](http://www.davidlister.com/images/minerva_sm.jpg)
I have a gravy boat with a minerva mark just below the rim. The mark says "MINERVA" within the shield and just above the shied there is a separate mark that says MINERVA. Has anyone seen this version of the MINERVA mark? Can I take it to mean that this piece is French silver at some particular level of purity (.800, .950, etc.)? Thanks!