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Dear visitors, aims to provide you with easily accessible information. With the help of various algorithms, catalogs can be created very quickly in various areas. Despite partial automation, the creation is associated with some effort. In principle, high-quality overviews require extensive manual research and processing. The maintenance of the underlying software also requires time and financial resources.

You are welcome to support this project financially or in terms of content:

Are you an author, collector or dealer, and would you like to contribute something in terms of content? Or do you own a catalog whose copyright protection has already expired? Contact to share your information with others.

We hope to be able to help you with your research in the future as well,

Claude Dürr