Boxers - 1896Great Dane - 1912Mastiff - 1931Bulldog - 1934Bordeaux - 1930Bullmastiffs - 1923, 1900 &
Boxers - 1896Great Dane - 1912Mastiff - 1931Bulldog - 1934Bordeaux - 1930Bullmastiffs - 1923, 1900 & 1910Tibetan Mastiff, 1912Click images for full captions from the book[ Source: Fighting Dog Breeds / Dr. Dieter Fleig ] -- source link
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