I concur one hundred times over. I was chasing the Western Field(Montgomery Wards) aspect of the purported note and see that Iver Johnson there. Iver Johnson was the Simson & Co. importer to the U.S. of A. in the mid 1920s. So as a very longshot, there could have been some contorted Montgomery Wards Western Field - Iver Johnson - German maker link? A very long shot in high winds & a limb in the way, but it might be possible.

https://gun-data.com/Montgomery_ward_firearms.html

Cheers,

Raimey
rse