The DRP date is 1903 & the 9,3X74R arrived on the scene about the same time. So the Gustav Kersten >>Mouse Trap<< and the Cartridge were pretty much running parallel in time coupled together by the talented designer Gustav Kersten. And all the press wasn't push button and >>in your face<< like it is today and it took time to get the word out thru publications and adverts.


Hochachtungsvoll,
Raimey
rse