I guess I will stop hoping to see an L61R mannlicher in 6.5x55 to show up somewhere.
Correct. The file doesn't format/view very well....you have to go into Acrobat and do a 2-page view, where you can see the columns line up better. There are 12 rifles in .375 listed, and 9 of those are Mannlicher rifles. #42329 is one that doesn't have the Mannlicher comment with it.listed in the factory records is 42329. The inspection date of 29 April 1969 and caliber of .375 agree on both your list and the factory records.
Curiously, it is listed in the factory inspection records with a "D", indicating a Deluxe, not a Mannlicher. It is also listed in the shipping records as a Deluxe which was shipped to the distributor in England.