For clarity, dimensions appear to be INCH and METRIC; i.e., (1" - 10mm). Thank you for posting. Appears to be hand-drawn! Love old technology!
The Austro-Hungarian Empire didn't go on the Metric System until 1871, nor did they use the English measure of inches, feet, and yards. Instead, the Imperial (Viennese) system of measurements was based upon the
Schritt, a military pace of 29.5 inches/.75 meters.
A
Punkt [Point] (iv on the drawings) was the smallest distance measurement, and was equivalent to 0.183 mm or 0.00717 inches.
Twelve
Punkt made a
Linie [Line] (''' on the drawings), which was equivalent to 2.195 mm or 0.08642 inches.
Twelve
Linie made a
Zoll (" on the drawings), which was theoretically the width of the joint of a man's thumb. A Zoll was equivalent to 26.34 mm or 1.0371 inches.
A Prussian
Schritt was different than a Bavarian
Schritt, which was different than a Swiss
Schritt, etc. Welcome to the wonderful world of measurement and trade prior to the universal adoption of the Metric System, except for us Yanks, of course. The above is why English and Metric screws don't generally fit imported System Augustin and Lorenz weapons, unless you strip the threads, of course.
The Russians continued the use the comparable
Arschin system until they went Metric after the Russian Revolution, which is why the M1891 Mosin-Nagant rifle was known to Russian troops as the "three line" rifle (3 .103 inch "lines" equaling .309 caliber.)
Regards,
Don Dixon