Here is the only picture of a short Tanchica I've found to date, could be the same as Rick's!
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A photo of an Albanian man with a Tanchica from 1908 by the adventurer Edith Durham who traveled Albania extensively by herself.
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Honest example of a Shishane in Bulgaria
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Bulgarian restoration
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Ottoman Gendarmerie in 1900, Shishane serving alongside Peabody-Martinis!
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Kurdish Gendarmerie in 1895
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A very interesting page from a 17th century document on Chinese firearms describing a "Lu Mi Chong" or "嚕密銃" which is a Turkish Matchlock that was tested and ultimately adopted in a slightly modified form by the Chinese.