Nice G-Date! The information you already have on your Lugers is probably the most you can find out about them. A letter from the Canadian marksman or some other documentation attesting to his ownership and the championships he won with it may have some value to future collectors.
A letter from the Colonel stating from whom he captured the S/42 and perhaps the "surrender papers" would go a long way toward establishing provenance and be of much interest. However, it does not absolutely guarantee that such documentation would be accepted by some collectors as establishing original ownership.
I would recommend obtaining as much documentation as you can and keep them with the Lugers. Every little bit helps in preserving history. Thank you for a look at a couple of very nice Lugers.
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If it's made after 1918...it's a reproduction
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