There are three marks to identify. The tiny central mark looks like the assay mark and appears to be a head (dog,eagle, duck, swan?) in a lozenge facing left, with an A to the left and 2 to the right. As I write this I have rotated the assay mark - see image - and indeed it appears to be a Czech dogs head - but then I would welcome an interpretation of the now inverted letters/numbers.
Asides this I am interested if anyone has seen a double lid like this before. One is large for pouring in, then there is a small lid on the spout, perfectly weighted, for pouring out?
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Thank you
Anthony