Help with a hall mark on a silver jug

[onlineshop]

I have no idea what this hallmark is. 4 marks. The first one looks like a medieval hood in a circle. The second says IMP in an oblong with cut off edges. The third looks like a triangle with possibly a crown or a turret on top also in a circle and the fourth is H1 in a square.

Help with a hall mark on a silver jug

I have no idea what this hallmark is. 4 marks. The first one looks like a medieval hood in a circle. The second says IMP in an oblong with cut off edges. The third looks like a triangle with possibly a crown or a turret on top also in a circle and the fourth is H1 in a square. https://www.silver-collector.com/t/help-with-a-hall-mark-on-a-silver-jug/18604?u=onlineshop

[silvermakersmarks]

Please post pictures.