Swiss POW label, just tied by clear cds. "THUN 29 III 71" to small envelope to the French embassy at Bern with arrival mark of the same day, fine and scarce, certificate Moser-Räz (1958) (Image 1) (Image 2) (Image 3) (Image)

Swiss label, just tied by clear cds. "ZÜRICH 4 III 71" on small envelope to France with several transit marks, fine, certificate Kimmel (1997) (Image 1) (Image 2) (Image 3) (Image)