This pump is owned by Helge Gruppe from Hessisch Oldendorf (Germany). He wrote about the pump:
»I found this pump during I cleaned up my shop. My grandfather, who worked during the winter months at the local bicycle and agricultural machine shop, used to own this pump. I assume that the pump is from this shop and landed some day at my grandfather´s home. I can darkly remember how my grandfather inflated my flat tyres when I was a child.«