Her is another one in the line of this unidentified model. Strange that it can't be find in any catalogue. It has a connection to Ginge, for sure. Question is if it was made in Denmark on license from Sievert. The only difference on mine is that the rods are painted red. It seems to be the original nuance. There are similarities to the 50-serie but that was introduced in 1934 in catalogue nr 933. All showned in this forum has plastic pump knobs so obviously of later production. And the tank is approx 3cm longer. The closest we come is the 207/208 model in Ginge 1939 years catalogue. This might have been the precursor. Bo