Stort porterglas 7/20 liter Drikkeglas The model appears both at

The model appears both at Holmegaard Glasværk in their catalogue from 1865 and in Kastrups Glasværk's catalogue from 1886

The glass is ground with facets up the stem

kaldet Berlinois

The glass is mouth-blown with a spherical sand navel at the bottom

it must therefore be thought that this decoration is from 1903

Stort porterglas 7/20 liter Drikkeglas The model appears both atHeight 17 cm. Large beer glass from the beginning of the 20th century with the measurement 7 20 l iter. It is mouth blown with clear grooves from the glassmaker's rod and a large sand nail at the bottom. The edge is cut and heated. 7 20 liters corresponds to 350ml, so it can be assumed that the glass is after 1907 when Denmark switched to metric units of measurement.