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Just my observation and since Switzerland is a diverse country, with 4 official languages, are the Germans over represented here, judging by the names ? See only one that could be French.
About 60% of the population has swiss-german as their first language, but we're most definately NOT germans.
The swiss don't like being called german or french or italian and get very angry when someone does so.
I used the abbreviations page over on swiss rifles and I assumed he might have had the rifle in his early years as he was born in 1917 and the rifle is a 1936 production so he would have been 19 and kept it as after his service. So he might have had both rifle and pistol while he was with the landwehr.