1915 - 1937, cancelled specialized collection parcel post stamps with more then 70 values from Michel no. 4 / 14, beginning with rarely cancellation of steel cancels and one multiplicity from colonies postmarks, often to field identified, with also 2 originals proof designs of the stamp "sitting bear", with many good values like Michel no. 6A (2), 10A, 12A, 7 / 11B and 13 (2), numerous values expertized (once with photo certificate), often selected condition, long-standing compiled very nice collection on stock pages, enormous catalog value (detailed listing is enclosed)