unused 1970 (11 Mar.) 4c. on 5c., a small study of the surcharge including a vertical pair, the upper stamp with surcharge omitted, a vertical strip of five, the bottom two stamps with surcharge omitted, a marginal vertical strip of three, the bottom stamp with surcharge double, two marginal singles, one with surcharge treble and the other with surcharge normal on front and inverted on reverse, and a non-marginal single with surcharge double. An interesting lot, fine mint. S.G. 398. (26)