German collector of crown caps, with collection list and images.
A Dutch collector presents his crown caps, with many links, thematic crown caps, water caps and trade list.
Collection of historic and current Hutter stoppers of beer bottles from breweries worldwide (more than 600 pictures of swingtops from 19 different countries).
Search engine for online bottle cap collections, with more than 270'000 entries.
Images of over 10,000 caps from numerous countries. Includes trade list.
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