1921-36 Cover sent to Switzerland, with postage due stamps applied on arrival, including 1922 commercial envelope, Colombian Oilfield, Barranquilla, franked with horizontal pairs of the Provisional 2c and 3c stamps, invalid uncancelled, and 30c and 50c postage dues applied in Berne, also 1921 postcard franked with a 3c value, with 25c postage due applied in Freiburg, a 1922 Union Cafetera Colombia printed envelope, franked with 10c, charged 30c and 50c in Basel, and a commercial envelope with 5c, charged 35c in Rebstein; a scarce group.

1925-29, Group of 9 SCADTA covers, three to Switzerland, one to USA, one to Peru, range of frankings with ovpts incl. "PE." on first flight mixed franking from Peru, "E" and "EU", a fine group. (Image)