Although I am from Frankfurt/Germany I am trying to contribute to wikipedia in english, too, as this ist the most comprehensive wiki.
I am a lover of mechanical wrist watches, therefore this is the main area where I can contribute some knowledge to wikipedia.
All I have done so far is an article about a small but notable swiss watch company (ochs und junior) and one of the most important watch geniuses of our time, Ludwig Oechslin (work in progress).