Got these bad boys off ebay, and was wondering if anyone could give me a little more information on them. So far I've learned that Mikov is the most common manufacturer, and they're popular in the Czech Republic. The 3 silver ones on the bottom are marked Mikov, but the top gold ones don't have a tang stamp, but are obviously from Gentleman's Hardware (I assume they're generic made in China.) Silvers have nice snap, but golds have little or no spring tension. Other than that, they're for professionals only, so I'm not sure I can technically carry them...