First of all a description of the sideswiper and its use.
Then, a gallery presenting some keys of telegraphy, old or current and classified in five families. A summary description is made on each one of these groups.
Lastly, a page devoted to links towards sites of collectors or manufacturers because telegraphy still today is very much used by the radio ham of the whole world.
Having lived this situation lasting a few years in Paris area, I could note the difficulties which one can encounter in a large city.
Difficult to free yourself from parasites linked to the urban environment but you can always find a solution to be active on HF bands. At the time, I used an isotron made with the means at hand, hung on the kitchen window (the only one that was not metallic).