Wonderful collection of the youth charity stamps, mint and used and on covers and FDCs, as well as booklets and other forms of official issue, written-up in 22 volumes with much of the best material placed in a stockbook for safe-keeping. Includes the forerunners with the set of three languages MNH incl. scarce 'un anno di sole' (cat. SFr.1,200) as well as the first booklet (10rp x15, purple cover), then highlights incl. 1913 #1 used block (cat. SFr.550), scarce 1915 5cts Apfenzeller Knabe booklet pane immaculate MNH, 1916 3cts on cover, 1918 set on cover, 1919 set in blocks of four on separate covers (cat. SFr840 for off-cover blocks), likewise blocks on cover sets for 1926 to1929 complete, 1930 set on FDCs (cat. SFr.800), 1939 set FDC, 1941 souvenir sheet used and on cover (cat. SFr.1,150), 1953 butterfly and beetle tête-bêche sheet MNH (cat. SFr.500) and the two booklets, both 1954 booklet types, etc, etc. The collection continues essentially complete in all the following formats: MNH blocks, used blocks, FDCs (often with blocks), booklets, maximum cards and PTT presentation cards, right through to 1999. Outstanding quality throughout. From the collection of Tony Hoyle, former President of the Helvetia Philatelic Society of Great Britain.