The Amberger Collection contains many, many items that are somehow related to fencing and swordplay, but lack their original context. This page, for example, was lifted from an unidentified 17th-century German chronicle.
It details the main events at the Ottoman court right before 1439.
One text segment is of particular interest to aficionados of sword fighting: The passage introduces “Georgius Castriotus, whom the Turks call Skanderbeg“ and a “wonderous fight at the Court of the Grand Turk Amurathis”, which occurred when Skanderbeg was 21 years old. Since the Albanian national hero Gjergj Kastrioti Skanderbeg was born May 6, 1405, this would place the event squarely in 1426.