Steamer trunk excelsior or Martian myer doll/toy or salesmens sample

Hi,this is my new Excelsior or Martian Mayer Doll or salesmens sample steamer trunk it measures 12" wide by 9 " tall by 8" depth it is in amazing condition and retains its original inner compartments their are no marking or signatures on this trunk other then a Eagle on the lock would love to know more about this trunk like when it may have been maybe I think 1870's and if anyone has or ever seen a trunk like this thanks.