This is an old thread, but I wanted to note that the Swiss Cross in Shield at Simpson is still available, and has been there for at least six years, so they might be willing to deal for an interested buyer.
https://simpsonltd.com/dwm-1906-swis...s-in-shield-3/
Marc is exactly correct above on the 800-gun range for the guns marked with both the stamps of Col. Muhlemann and Herr Vogelsong. I own one of these (#13937) discussed in an interesting thread on the other forum. I won't link it here, but a "Cross in Shield" search brings it pretty close to the top. Unfortunately the pictures don't appear to be working any more. It is indeed a beautiful gun and I am fortunate that I was in the right place at the right time to buy it from Bob Van Gelder.