used 1851 "Mercury" (6)Kr. yellow, a lovely example on thin paper showing 2½mm. sheet margin at top and portion of adjoining stamp at left, touched at foot, good colour and neatly cancelled by "KREMSMÜNSTER" c.d.s.; light corner bend at upper right. Ö.S.P. Certificate (1938). Ferchenbauer 7, Ö.S.130,000. Photo in colour