Belgian Colonies: Ruanda-Urundi: 1924-26 5c., 20c. (both), 40c. 50c. red-orange, 75c. blue, 3f., 5f., 10f., 1927-29 35c., 75c., 1f., 1f.75c. (2), 1927 1f.25 on 1f.50, also Belgian Congo 1931-32 3f.25 on 3f., all in mint blocks of four overprinted “SPECIMEN” and with small punch holes, some perf. separations, mainly fine.