The serial number 106079 dates it to 1930, see Jon Speed’s books.
Ch72 is the Mauser factory code for the barrel steel used.
10.45 mm = .411” is the bore/land diameter, 10.75 mm = .423” the groove diameter, 420 mm = 16.5” length of rifling twist.
67,49 is the old gauge number, lead balls to the English pound, for a bore/land diameter in between 10.41 mm = .410” and and 10.66 mm = .419”. Though out of use elsewhere in Germany since 1912, the Mauser factory continued to mark these gauge numbers on their commercial barrels until WW2.
BGU are the usual 1893 to 1939 German rifle proof marks.