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I still have yet to see a Galand in person. Whenever we go on vacation I try to find any and all museums with an arms collection, disply to look at. The first time I went to Reno the Harrah's collection (or parts) were still displayed in the casino. The Carson City ,Nev. Mint Building has a good collection and the first genuine Hawken gun I've ever seen. Even Knott's Berry Farm had an impressive display 15 or so years ago. There are many museums that I have yet to visit of course.
Locally, Columbia Gorge Interpretive Center, in Stevenson,WA has a Mississippi in .54 and a Ballard that IIRC is in .40 caliber. Fort Vancouver has an authentic trade musket that is smooth bore (caliber unknown) and a pistol that IIRC about .45. Both have very unique and interesting artifacts.
From what I have learned so far is that of the modern muskets, both the missisippi and the 1855 1st model has a prominent place in Washington military history. I am sure there are a few more yet to be discovered by myself as amateur research continues.