I have the pleasure of being a member of a small, but knowledgeable, militaria collectors organization and one of the more popular activities we do is "Show and Tell" night. The way this works is, a particular theme is announced, members bring related items from their collections, then are provided an opportunity to stand and give a short presentation to the group.
These web pages are an extension of this idea.

Passing knowledge on to others is an interesting experience. Aside from possibly inspiring the listener, it also helps the "teacher". Questions from the audience often are a challenge to one's understanding of the material. I have found the effort to present a subject to a group (or to create a written document) enhances one's own perspective of the subject and is a motivation to continue learning.

Seems a pity to collect this stuff and just leave it sit, removed from public view. Some keep their treasures tucked away, holding those hard won nuggets of history guarded and close. Others make the effort to bring their collections to the public, at shows and exhibitions, in order to share what they have learned and help preserve the history. I have elected to use the Internet to emulate the latter.