unused Block Larger Than four 1956-58 stamps of China surcharged with Unit stamp 3c. on deep magenta perf. (400) and roulette (279), 3c. on bright blue-green (779), 10c. on rose-red (235), 20c. on orange first (190) and second (516) settings and Air $3.50 on $5 (498), a few tone spots. S.G. 224, 232, 242, 243, 304-305, £2440