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On the rim of the base are 2 marks - see left hand side of second image

The first looks like AV in a hexagon with a smaller A in the upper left hand corner (which I have seen described as an Austrian Import mark - is this true?). The second mark looks like a pair of oval marks with a cross hatch line pattern.
Underneath the box are a pair of marks - see right hand of image One looks like a leaf and the other is an upper case A with a pair of dots either side
Can anyone please give me any information about these marks? - country of origin? date? maker? etc
DavidO