on piece 1893 reverse of cover bearing Small Dragon 1ca. and 5ca. pairs cancelled by Ichang seal, showing "CUSTOMS ICHANG" (10.11), blue "CUSTOMS/SHANGHAI" (16.11) and "HONG KONG" (21.11) c.d.s. adjacent. Fine and rare. Illustrated in The Revenue Surcharge handbook, Vol. II, p. 838. Photo