used Watermark horizontal, thick paper ½d. to 1/- (two of each, one set on locally addressed front - the ½d. and 6d. crossed by vertical crease), and watermark vertical, medium to thick paper ½d. to 2/6d. (R.P.S. Certificate, 1939) set of eight; all used, good to fine. S.G. 1-7, 9-16, £813