I have a set of three dressing table/travel-case glass, rectangular shaped boxes with pierced design silver lids. There is only one hallmark on each lid, that of Minerva - the stamp relating to silver of 950-1000 - there are no other marks on the lids though there does seem to be a mark directly behind the Minerva stamp, however, this could be imprint from Minerva on other side.
I’m trying to date the items, so any help is much appreciated.