Hello, I recently acquired this lamp. Does anyone have any information about this model 251? I haven't been able to find any information about it so far.
@Jan R What catalogue? The Pressure Lamp Catalogue has this information as two lines of text in a list of models. Tony
@Jan R Welcome to the forum The pressure gauge and pump cover are pre-war,but the handwheel is like on the post-war AIDA models. Does the pressure gauge have a DRP stamp ? Please check if the tank has a scratch on the underside,for age determination.
Hello Yes, the handwheel is the wrong one. I have since replaced it with an original pre-war Aida. The pressure gauge is labeled DRP. So far, I have only found the marking N/2 on the bottom of the tank.
@Jan R Please show us a photo of the scratch on the underside of the tank. @Jörg Wekenmann Can you tell us in which year AIDA was acquired by Ehrich&Graetz ?
Hello Reinhard, In 1923, Jacob Hirschhorn oHG was converted into Jacob Hirschhorn AG. In the same year, Robert Frister AG, Berlin, acquired Hirschhorn AG. In 1938, R. Frister AG sold Hirschhorn AG to Ehrich & Graetz. Best regards, Jörg
@Jörg Wekenmann Thank you so much,I'm glad you knew that I've noticed for some time now that some of the components used by Petromax and AIDA were the same even before the war.
Please excuse me, everyone, but I made a typo! It should read: In 1928, R. Frister AG sold Hirschhorn AG to the company Ehrich & Graetz.