Being landlocked, Switzerland is not often thought of as a maritime power. Notwithstanding this, postal steamers on Switzerland’s larger navigable lakes carry domestic mail.

1864 folded letter from Rorschach to Schwyz transited through the ship bureau
at Luzern before steamer carriage on the Vierwaldstattersee

1937 tourist postcard to London mailed aboard steamer traveling between Luzern
and Fluelen